Next Astro Net airs at 8:00 p. m., Wed., Sept. 11, 2024
Tune to 147.045 MHz; PL tone of 131.8 Hz; offset @ +600 kHz.
The Sun & ham radioExplore effects of solar flares, solar radiation, and geomagnetic storms on ham radio propagation.
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Space weatherNot only Earth has its own weather, but the Sun and Solar System have their own distinct space weather.
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Ham radio conditionsHams can keep up-to-date on HF conditions and basic protection for their station against EMP.
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Note: No Astro Net recap for August 21, 2024
Highlights from on-the-air ham radio transmission on 147.045 MHz
No "official" installment of the Astro Net for 8/21/2024, since Glenn KD9PNY and I (Roy KD9RSE) were not on-the-air to conduct it in-person on its scheduled air date of 8/21/24.
The KA9QJG repeater is still offline for now. The Astro Net is anticipated to resume, but the current return date is uncertain as of this post.
Thank you to all the listeners who have followed the Astro Net and to all the check-ins who've taken the time to turn on, tune in, and key up. More to follow at a later date. Please stay tuned.
When the Astro Net may return, then we can be back on-the-air. But if the weather is clear at night, in the meantime it's still worthwhile to observe.
On lunar activity:
At two days past the recent Supermoon / Blue Moon combo, the Moon shows a waning gibbous phase, which means that the visible Moon will rise later and later, be mostly visible between midnight and dawn, and, shrink to a crescent shape before sunup in less than two weeks.
These shots (below, left to right, taken before 1 a. m. on 8-22-24) show the effects of increasing magnification, at 54x, 145x, and 350x. Note as one zooms in, the visible lunar landscape tightens (which is expected); but, as magnification increases a great deal, the image dims a bit, since the magnifier (i.e., the telescope's eyepiece) cannot gather enough light from the source to keep bright the overall field of view. Also, at higher magnifications, it's not necessary to use a polarizing filter to reduce lunar brightness.
Also, with increased magnification the focus can soften, or get slightly blurred, since the magnifier also enhances the effect of heat rising up through the air after sundown, which can make the image quickly move in- and out-of-focus moment-to-moment.
Images taken with a cell phone through a homebuilt reflecting telescope of six-inch aperture.
The KA9QJG repeater is still offline for now. The Astro Net is anticipated to resume, but the current return date is uncertain as of this post.
Thank you to all the listeners who have followed the Astro Net and to all the check-ins who've taken the time to turn on, tune in, and key up. More to follow at a later date. Please stay tuned.
When the Astro Net may return, then we can be back on-the-air. But if the weather is clear at night, in the meantime it's still worthwhile to observe.
On lunar activity:
At two days past the recent Supermoon / Blue Moon combo, the Moon shows a waning gibbous phase, which means that the visible Moon will rise later and later, be mostly visible between midnight and dawn, and, shrink to a crescent shape before sunup in less than two weeks.
These shots (below, left to right, taken before 1 a. m. on 8-22-24) show the effects of increasing magnification, at 54x, 145x, and 350x. Note as one zooms in, the visible lunar landscape tightens (which is expected); but, as magnification increases a great deal, the image dims a bit, since the magnifier (i.e., the telescope's eyepiece) cannot gather enough light from the source to keep bright the overall field of view. Also, at higher magnifications, it's not necessary to use a polarizing filter to reduce lunar brightness.
Also, with increased magnification the focus can soften, or get slightly blurred, since the magnifier also enhances the effect of heat rising up through the air after sundown, which can make the image quickly move in- and out-of-focus moment-to-moment.
Images taken with a cell phone through a homebuilt reflecting telescope of six-inch aperture.
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Note: No Astro Net recap for August 7, 2024
Highlights from on-the-air ham radio transmission on 147.045 MHz
No "official" installment of the Astro Net for 8/7/2024, since Glenn KD9PNY and Roy KD9RSE were not on-the-air to conduct it in-person on its last scheduled air date of 8/7/24. When we're able to do so, then we'll resume; until then, the mothership will stay in orbit and continue to monitor the situation.
The KA9QJG repeater is offline for now. The Astro Net is anticipated to resume (perhaps in two weeks on August 21st), but the current return date is uncertain as of this post.
Thank you to all the listeners who have followed the Astro Net and to all the check-ins who've taken the time to turn on, tune in, and key up. More to follow at a later date. Please stay tuned.
But since there are still neat things to see in the sky, here's a quick rundown.
On solar activity:
At this link, one can continue to track solar activity. Earth got slammed in recent days and HF propagation has been up-and-down; solar indices are way up or just plain jumpy. There are even more solar storms to come today (8/8). Sure glad Earth has a magnetic field and an atmosphere to protect us ham-radio operators.
At this link is how these indices can affect ham radio propagation.
On lunar activity:
Just past the New Moon phase (as of this date), the Moon now appears in the sky as a waxing crescent all this week, just after sunset. Look for it in the southwestern sky; watch it grow night-after-night, rising about 52 minutes later each day and seen a little East of the position you saw it the previous night; that's how the Moon moves, as seen from Earth. View it through a binocular; pleasing to see.
On planet activity:
In recent months the planets; for this month, go to this link. In pre-dawn twilight, the planets Jupiter, Mars, and Saturn rise at an angle up from the eastern horizon to the southeast.
With all of the planets recently in the morning sky, several will group together by month’s end to make for a spectacular display before sunup on August 28th. That is, that morning’s line-up will include, up from the horizon, Mercury, Mars, Jupiter, Uranus, Neptune, and Saturn across the sky from the east-northeast to the west-southwest. (See the chart, just below, for this line-up; some names of weak meteor showers also appear in the chart.)
The KA9QJG repeater is offline for now. The Astro Net is anticipated to resume (perhaps in two weeks on August 21st), but the current return date is uncertain as of this post.
Thank you to all the listeners who have followed the Astro Net and to all the check-ins who've taken the time to turn on, tune in, and key up. More to follow at a later date. Please stay tuned.
But since there are still neat things to see in the sky, here's a quick rundown.
On solar activity:
At this link, one can continue to track solar activity. Earth got slammed in recent days and HF propagation has been up-and-down; solar indices are way up or just plain jumpy. There are even more solar storms to come today (8/8). Sure glad Earth has a magnetic field and an atmosphere to protect us ham-radio operators.
At this link is how these indices can affect ham radio propagation.
On lunar activity:
Just past the New Moon phase (as of this date), the Moon now appears in the sky as a waxing crescent all this week, just after sunset. Look for it in the southwestern sky; watch it grow night-after-night, rising about 52 minutes later each day and seen a little East of the position you saw it the previous night; that's how the Moon moves, as seen from Earth. View it through a binocular; pleasing to see.
On planet activity:
In recent months the planets; for this month, go to this link. In pre-dawn twilight, the planets Jupiter, Mars, and Saturn rise at an angle up from the eastern horizon to the southeast.
With all of the planets recently in the morning sky, several will group together by month’s end to make for a spectacular display before sunup on August 28th. That is, that morning’s line-up will include, up from the horizon, Mercury, Mars, Jupiter, Uranus, Neptune, and Saturn across the sky from the east-northeast to the west-southwest. (See the chart, just below, for this line-up; some names of weak meteor showers also appear in the chart.)
Of course, the closer planets will be visible by eye and binocular; the more distant Solar System neighbors will require a fair-sized telescope to spot well. The entire rare display should be a delight to view with a binocular, since this apparition on that morning before sunup will include our nearest celestial neighbor, the Moon, as well.
On meteor activity:
And this month also brings us the famed annual meteor shower of the Perseids. Peaking in intensity on or about mid-August, these meteors are often seen as occasional bright fireballs leaving long, smoky trains. Likely the better times to observe will be late in the evening after sundown and into the wee hours of the morning before sunup on August 11th through the 13th; an hourly peak count of perhaps 100 meteors per hour to occur by August 12th.
Note, too, that on a clear Summer's night, as mentioned previously on the Astro Net, one needs no special equipment to view meteors and meteor showers by eye, mainly sporadic meteors may be visible after midnight on any clear night. That's all for now.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
On meteor activity:
And this month also brings us the famed annual meteor shower of the Perseids. Peaking in intensity on or about mid-August, these meteors are often seen as occasional bright fireballs leaving long, smoky trains. Likely the better times to observe will be late in the evening after sundown and into the wee hours of the morning before sunup on August 11th through the 13th; an hourly peak count of perhaps 100 meteors per hour to occur by August 12th.
Note, too, that on a clear Summer's night, as mentioned previously on the Astro Net, one needs no special equipment to view meteors and meteor showers by eye, mainly sporadic meteors may be visible after midnight on any clear night. That's all for now.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
Astro Net recap, for July 24, 2024
Highlights from on-the-air ham radio transmission on 147.045 MHz
For the 55th installment of the Astro Net on 7/24/2024, Roy KD9RSE and Glenn KD9PNY paid homage to the 55th anniversary of Apollo 11, the first landing on the Moon on July 20,1969.
On solar activity:
Glenn KD9PNY and Roy KD9RSE reported on recent activity from the Sun. Solar Cycle 25 still shows fairly high indices, not unusual for this part of the solar cycle. At this link, one can continue to track solar activity. Don KA9QJG asked about how best one should read these indices, the interpretation of which can be discerned at this link; at this link is how these indices can affect ham radio propagation.
On lunar activity:
Just past the Full Moon phase (as of this recap), the Moon now shows up in the sky as waning gibbous most of the night till dawn. One would need to rise after midnight or before sunup to see this phase, but it does give a set of shadows on lunar features not usually seen, if one does not regularly view the Moon before dawn. Within the next week, the Moon will appear slimmer as a waning crescent before sunup.
On planet activity:
Roy KD9RSE reminded check-ins and listeners where to view the planets; for this month, go to this link. In pre-dawn twilight, the planets Jupiter, Mars, and Saturn rise at an angle up from the eastern horizon to the southeast.
On meteor activity:
Fairly weak meteor showers, in terms of numbers of meteors seen per hour, may be visible this week, namely, the gamma-Draconids and alpha-Capricornids. Check this link for maps and directions on where and when to look.
On a clear Summer's night, as mentioned previously on the Astro Net, one needs no special equipment to view meteors and meteor showers by eye, mainly sporadic meteors may be visible after midnight on any clear night.
On stellar activity:
As mentioned, too, in the previous Astro Net, one might wonder what star patterns can best be seen on a clear night in Summer. So, while scanning the Summer sky, explore some fine summertime constellations and other night-sky features, at this link, to know where to look and what to see.
On other items:
Don KA9QJG asked about how one might observe remotely; that is, the possibilities of using a telescope outdoors while seated indoors. First of all, many commercial (and homebuilt) telescopes often come equipped with mounts that allow the scope access to the entire sky. This is done by way of two axes (together called an equatorial mount); that is, one axis moves the scope in celestial longitude (called right ascension) and the other axis moves the scope in celestial latitude (called declination).
Compact and strong electric motors on each of the axes are often included on commercial telescopes, which helps to drive the scope quickly to new sky objects, and, then helps to track objects in the night sky (and in the daytime sky) in real time. This keeps sky objects centered in the telescope and makes it convenient to view them.
But, if one wants to have the telescope do its work outdoors on a warm humid night or on a cold snowy night, then one can automate the scope to make its motors move while you reside comfortably indoors. There are several ways to do this:
One can fully outfit one's own telescope to be operated remotely with a dedicated computer connection. A detailed example is presented at this link. Certain kinds of computerized scopes, known as GoTo telescopes, can be operated remotely with one's phone, at this link.
Or, one can schedule time on a telescope, like a timeshare; see an example of that kind of set-up at this link.
Or, if you set your sights bigger, you can seek to operate one of NASA's own telescopes, as described at this link.
If you don't yet have a telescope and just want to look through one on your own, seek out to a star party sometime this Summer. Like a hamfest of amateurs dedicated to the medium of radio, a star party likely has as many fans in amateur astronomy devoted to the night sky. Check one out soon; a list of well-known parties nationwide are listed at this link.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KA9QJG Don
Once again, thoughts and prayers from the Astro Net to Don's wife, Betty.
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next regular Astro Net on Wednesday, August 7, 2024, at 8:00 p. m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
On solar activity:
Glenn KD9PNY and Roy KD9RSE reported on recent activity from the Sun. Solar Cycle 25 still shows fairly high indices, not unusual for this part of the solar cycle. At this link, one can continue to track solar activity. Don KA9QJG asked about how best one should read these indices, the interpretation of which can be discerned at this link; at this link is how these indices can affect ham radio propagation.
On lunar activity:
Just past the Full Moon phase (as of this recap), the Moon now shows up in the sky as waning gibbous most of the night till dawn. One would need to rise after midnight or before sunup to see this phase, but it does give a set of shadows on lunar features not usually seen, if one does not regularly view the Moon before dawn. Within the next week, the Moon will appear slimmer as a waning crescent before sunup.
On planet activity:
Roy KD9RSE reminded check-ins and listeners where to view the planets; for this month, go to this link. In pre-dawn twilight, the planets Jupiter, Mars, and Saturn rise at an angle up from the eastern horizon to the southeast.
On meteor activity:
Fairly weak meteor showers, in terms of numbers of meteors seen per hour, may be visible this week, namely, the gamma-Draconids and alpha-Capricornids. Check this link for maps and directions on where and when to look.
On a clear Summer's night, as mentioned previously on the Astro Net, one needs no special equipment to view meteors and meteor showers by eye, mainly sporadic meteors may be visible after midnight on any clear night.
On stellar activity:
As mentioned, too, in the previous Astro Net, one might wonder what star patterns can best be seen on a clear night in Summer. So, while scanning the Summer sky, explore some fine summertime constellations and other night-sky features, at this link, to know where to look and what to see.
On other items:
Don KA9QJG asked about how one might observe remotely; that is, the possibilities of using a telescope outdoors while seated indoors. First of all, many commercial (and homebuilt) telescopes often come equipped with mounts that allow the scope access to the entire sky. This is done by way of two axes (together called an equatorial mount); that is, one axis moves the scope in celestial longitude (called right ascension) and the other axis moves the scope in celestial latitude (called declination).
Compact and strong electric motors on each of the axes are often included on commercial telescopes, which helps to drive the scope quickly to new sky objects, and, then helps to track objects in the night sky (and in the daytime sky) in real time. This keeps sky objects centered in the telescope and makes it convenient to view them.
But, if one wants to have the telescope do its work outdoors on a warm humid night or on a cold snowy night, then one can automate the scope to make its motors move while you reside comfortably indoors. There are several ways to do this:
One can fully outfit one's own telescope to be operated remotely with a dedicated computer connection. A detailed example is presented at this link. Certain kinds of computerized scopes, known as GoTo telescopes, can be operated remotely with one's phone, at this link.
Or, one can schedule time on a telescope, like a timeshare; see an example of that kind of set-up at this link.
Or, if you set your sights bigger, you can seek to operate one of NASA's own telescopes, as described at this link.
If you don't yet have a telescope and just want to look through one on your own, seek out to a star party sometime this Summer. Like a hamfest of amateurs dedicated to the medium of radio, a star party likely has as many fans in amateur astronomy devoted to the night sky. Check one out soon; a list of well-known parties nationwide are listed at this link.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KA9QJG Don
Once again, thoughts and prayers from the Astro Net to Don's wife, Betty.
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next regular Astro Net on Wednesday, August 7, 2024, at 8:00 p. m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
Astro Net recap, for July 10, 2024
Highlights from on-the-air ham radio transmission on 147.045 MHz
For the 54th installment of the Astro Net on 7/10/2024, Roy KD9RSE piloted the Net solo into low-Earth orbit, as Glenn KD9PNY was away on special assignment elsewhere in the cosmos.
On solar activity:
Roy KD9RSE reported on recent activity from the Sun, including a fairly major solar flare classified as M9.3, at this link; in addition, a proton storm and a CME (i.e., a coronal mass ejection), possibly aimed at Earth, which can be examined at this link. Classification of solar flares and such can be found at this link.
Solar Cycle 25 still shows fairly high indices, not unusual for this part of the solar cycle. At this link, one can continue to track solar activity.
On lunar activity:
Just past the New Moon phase, the Moon now shows as a waxing crescent in the western sky just after sundown. During this growing phase of the Moon, one might also witness a phenomenon known as earthshine, which is sunlight reflected off the Earth and onto the Moon, as seen by us from our earthly advantage.
In folklore, this phenomenon was often called the "old Moon in the new Moon's arms". This phenomenon can be seen not only after sundown in the western sky when one views the Moon as a waxing crescent, but also later in the lunar month before sunup in the eastern sky when one sees the Moon in its slimming phase known as a waning crescent.
In the month of July, the Moon at its full phase in folklore is known as the Full Buck Moon, due to that time of Summer when male deer grow out their antlers.
As outlined at the last Astro Net, the Moon as seen in our sky in Summer mirrors the path of the Sun as seen in our sky in Winter. For example, during this month of July while the Moon rides low, just barely above the trees, it shows the path the Sun will take six months later in Winter. The same visual effect in the sky is seen in Winter. That is, during January the Moon appears high in the sky at night, perhaps lighting up a snowy landscape; but, it also shows the path the Sun will take six months later during the day in Summer. See the explanation at this link.
On planet activity:
Roy KD9RSE reminded check-ins and listeners where to view the planets; for this month, go to this link. In pre-dawn twilight, the planets Jupiter, Mars, and Saturn rise at an angle up from the eastern horizon to the southeast.
On meteor activity:
At least one meteor shower, though fairly weak in numbers of meteors per hour, may be visible this week and next week, namely, the alpha-Capricornids, the radiant of which is located just east of the constellation Sagittarius (the Archer).
On a clear Summer's night, as mentioned previously on the Astro Net, one needs no special equipment to view meteors and meteor showers by eye, mainly sporadic meteors may be visible after midnight on any clear night.
On stellar activity:
While scanning the Summer sky, you can look for other fine summertime constellations, at this link, to know where to look and what to see.
On other items:
Hurricane Beryl has been in the news, as it was touted as the first Category 5 hurricane logged in the month of July. The strength of hurricanes is measured by the Saffir-Simpson Hurricane Wind Scale, based on types of damage due to increasing wind speed, as outlined at this link. Note, too, that Beryl was able to be tracked for a while, since such major storms follow a pattern of growth and movement over a period of many days. Along with its formation are many attendant effects, such as high winds, flooding rains, and a storm surge. That pattern of growth and movement from tropical disturbance to tropical depression to tropical storm to hurricane (and all of the attendant effects) are outlined at this link.
And if one wants to get away from hurricane winds and flooding rains, you might venture out to a star party sometime this Summer. Like a hamfest of amateurs dedicated to the medium of radio, a star party likely has as many fans in amateur astronomy devoted to the night sky. Check one out soon; a list of well-known parties nationwide are listed at this link.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KA9QJG Don
K9ABN Ed
K9SGA Dan
KD9SRF Rowdy
Once again, thoughts and prayers from the Astro Net to Don's wife, Betty.
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next regular Astro Net on Wednesday, July 24, 2024, at 8:00 p. m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
On solar activity:
Roy KD9RSE reported on recent activity from the Sun, including a fairly major solar flare classified as M9.3, at this link; in addition, a proton storm and a CME (i.e., a coronal mass ejection), possibly aimed at Earth, which can be examined at this link. Classification of solar flares and such can be found at this link.
Solar Cycle 25 still shows fairly high indices, not unusual for this part of the solar cycle. At this link, one can continue to track solar activity.
On lunar activity:
Just past the New Moon phase, the Moon now shows as a waxing crescent in the western sky just after sundown. During this growing phase of the Moon, one might also witness a phenomenon known as earthshine, which is sunlight reflected off the Earth and onto the Moon, as seen by us from our earthly advantage.
In folklore, this phenomenon was often called the "old Moon in the new Moon's arms". This phenomenon can be seen not only after sundown in the western sky when one views the Moon as a waxing crescent, but also later in the lunar month before sunup in the eastern sky when one sees the Moon in its slimming phase known as a waning crescent.
In the month of July, the Moon at its full phase in folklore is known as the Full Buck Moon, due to that time of Summer when male deer grow out their antlers.
As outlined at the last Astro Net, the Moon as seen in our sky in Summer mirrors the path of the Sun as seen in our sky in Winter. For example, during this month of July while the Moon rides low, just barely above the trees, it shows the path the Sun will take six months later in Winter. The same visual effect in the sky is seen in Winter. That is, during January the Moon appears high in the sky at night, perhaps lighting up a snowy landscape; but, it also shows the path the Sun will take six months later during the day in Summer. See the explanation at this link.
On planet activity:
Roy KD9RSE reminded check-ins and listeners where to view the planets; for this month, go to this link. In pre-dawn twilight, the planets Jupiter, Mars, and Saturn rise at an angle up from the eastern horizon to the southeast.
On meteor activity:
At least one meteor shower, though fairly weak in numbers of meteors per hour, may be visible this week and next week, namely, the alpha-Capricornids, the radiant of which is located just east of the constellation Sagittarius (the Archer).
On a clear Summer's night, as mentioned previously on the Astro Net, one needs no special equipment to view meteors and meteor showers by eye, mainly sporadic meteors may be visible after midnight on any clear night.
On stellar activity:
While scanning the Summer sky, you can look for other fine summertime constellations, at this link, to know where to look and what to see.
On other items:
Hurricane Beryl has been in the news, as it was touted as the first Category 5 hurricane logged in the month of July. The strength of hurricanes is measured by the Saffir-Simpson Hurricane Wind Scale, based on types of damage due to increasing wind speed, as outlined at this link. Note, too, that Beryl was able to be tracked for a while, since such major storms follow a pattern of growth and movement over a period of many days. Along with its formation are many attendant effects, such as high winds, flooding rains, and a storm surge. That pattern of growth and movement from tropical disturbance to tropical depression to tropical storm to hurricane (and all of the attendant effects) are outlined at this link.
And if one wants to get away from hurricane winds and flooding rains, you might venture out to a star party sometime this Summer. Like a hamfest of amateurs dedicated to the medium of radio, a star party likely has as many fans in amateur astronomy devoted to the night sky. Check one out soon; a list of well-known parties nationwide are listed at this link.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KA9QJG Don
K9ABN Ed
K9SGA Dan
KD9SRF Rowdy
Once again, thoughts and prayers from the Astro Net to Don's wife, Betty.
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next regular Astro Net on Wednesday, July 24, 2024, at 8:00 p. m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
Astro Net recap, for June 19, 2024
Highlights from on-the-air ham radio transmission on 147.045 MHz
For the 53rd installment of the Astro Net on 6/19/2024, Roy KD9RSE and Glenn KD9PNY ran a quick flight of the Net, like a drone taking in the scenery aloft.
On solar activity:
Glenn KD9PNY reported on recent activity from the Sun, at this link; Solar Cycle 25 still shows moderately high indices, not unusual as we near the peak of a solar cycle. At this link, one can track solar activity.
On lunar activity:
As indicated during the last Astro Net, by American colonial and native folklore, June's full phase is known as the Full Strawberry Moon, as the tart red fruit now fills grocery stores' produce section. The Full Moon also coincides fairly well with the Summer Solstice, the astronomical start of the Summer season, and its many celebrations around the world and in history.
Also, this month's Full Moon is also the lowest Full Moon in the sky. That is, this month is a special Solstice Moon, which occurs just after the Summer Solstice. So, while the Sun is highest in the sky at that time in the day sky, the Moon appears lowest in the night sky.
The Moon's path, as seen in our sky in Summer, mirrors the path of the Sun as seen in our sky in Winter. For example, during this month of June while the Moon rides low, just barely above the trees, it shows the path the Sun will take six months later in Winter. The same visual effect in the sky is seen in Winter. That is, during December the Moon appears high in the sky at night, perhaps lighting up a snowy landscape; but, it also shows the path the Sun will take six months later during the day in Summer. See the explanation at this link.
On planet activity:
Glenn KD9PNY and Roy KD9RSE informed check-ins and listeners where to view the planets; for this month, go to this link. In pre-dawn twilight, the planets Jupiter, Mars, and Saturn rise at an angle up from the eastern horizon to the southeast. From our earthly vantage, Mercury has now passed into the evening sky, but is difficult to view, mostly lost in the glare of the Sun after sundown.
On meteor activity:
On a clear Summer's night, as mentioned previously on the Astro Net, one needs no special equipment to view meteors and meteor showers by eye, mainly sporadic meteors may be visible after midnight on any clear night.
On stellar activity:
Roy KD9RSE indicated that recent news outlets and astronomers are anticipating the prospect of witnessing a nova this Summer. The sudden brightening of a star, known as a nova, may have chance to appear in the small constellation Corona Borealis (aka "Northern Crown"). The star, named T Coronae Borealis, may blaze forth some night soon, astronomers hope.
While scanning the Summer sky for novae, you can look for other fine summertime constellations, at this link, to know where to look and what to see.
On other items:
Don KA9QJG asked whether websites, such as Heavens Above, still provide data about when to see things in the night sky. Indeed, that site does list times and dates for many satellites, including amateur radio satellites.
Nick KD9IQU, a drummer and one of the net controllers for this repeater's Blistered Pinky Net, joined in the Astro Net to announce the passing of his horse named Dixie. It was in the barn, where the Blistered Pinky Net musicians rehearse, that Dixie would listen to (and presumably critique) the music. Perhaps Dixie will now be grazing in the heavens above amid the two horse constellations in the night sky: one is Pegasus; the other is Equuleus. In the meantime, we might be singing the Blues for Dixie.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KA9QJG Don
K9ABN Ed
KD9ITL Bob
KD9IQU Nick
K9SGA Dan
KD9QGP Dustin
KD9SRF Rowdy
KF9ER Paul
Once again, thoughts and prayers from the Astro Net to Don's wife, Betty.
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next regular Astro Net on Wednesday, July 10, 2024, at 8:00 p. m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
On solar activity:
Glenn KD9PNY reported on recent activity from the Sun, at this link; Solar Cycle 25 still shows moderately high indices, not unusual as we near the peak of a solar cycle. At this link, one can track solar activity.
On lunar activity:
As indicated during the last Astro Net, by American colonial and native folklore, June's full phase is known as the Full Strawberry Moon, as the tart red fruit now fills grocery stores' produce section. The Full Moon also coincides fairly well with the Summer Solstice, the astronomical start of the Summer season, and its many celebrations around the world and in history.
Also, this month's Full Moon is also the lowest Full Moon in the sky. That is, this month is a special Solstice Moon, which occurs just after the Summer Solstice. So, while the Sun is highest in the sky at that time in the day sky, the Moon appears lowest in the night sky.
The Moon's path, as seen in our sky in Summer, mirrors the path of the Sun as seen in our sky in Winter. For example, during this month of June while the Moon rides low, just barely above the trees, it shows the path the Sun will take six months later in Winter. The same visual effect in the sky is seen in Winter. That is, during December the Moon appears high in the sky at night, perhaps lighting up a snowy landscape; but, it also shows the path the Sun will take six months later during the day in Summer. See the explanation at this link.
On planet activity:
Glenn KD9PNY and Roy KD9RSE informed check-ins and listeners where to view the planets; for this month, go to this link. In pre-dawn twilight, the planets Jupiter, Mars, and Saturn rise at an angle up from the eastern horizon to the southeast. From our earthly vantage, Mercury has now passed into the evening sky, but is difficult to view, mostly lost in the glare of the Sun after sundown.
On meteor activity:
On a clear Summer's night, as mentioned previously on the Astro Net, one needs no special equipment to view meteors and meteor showers by eye, mainly sporadic meteors may be visible after midnight on any clear night.
On stellar activity:
Roy KD9RSE indicated that recent news outlets and astronomers are anticipating the prospect of witnessing a nova this Summer. The sudden brightening of a star, known as a nova, may have chance to appear in the small constellation Corona Borealis (aka "Northern Crown"). The star, named T Coronae Borealis, may blaze forth some night soon, astronomers hope.
While scanning the Summer sky for novae, you can look for other fine summertime constellations, at this link, to know where to look and what to see.
On other items:
Don KA9QJG asked whether websites, such as Heavens Above, still provide data about when to see things in the night sky. Indeed, that site does list times and dates for many satellites, including amateur radio satellites.
Nick KD9IQU, a drummer and one of the net controllers for this repeater's Blistered Pinky Net, joined in the Astro Net to announce the passing of his horse named Dixie. It was in the barn, where the Blistered Pinky Net musicians rehearse, that Dixie would listen to (and presumably critique) the music. Perhaps Dixie will now be grazing in the heavens above amid the two horse constellations in the night sky: one is Pegasus; the other is Equuleus. In the meantime, we might be singing the Blues for Dixie.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KA9QJG Don
K9ABN Ed
KD9ITL Bob
KD9IQU Nick
K9SGA Dan
KD9QGP Dustin
KD9SRF Rowdy
KF9ER Paul
Once again, thoughts and prayers from the Astro Net to Don's wife, Betty.
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next regular Astro Net on Wednesday, July 10, 2024, at 8:00 p. m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
Astro Net recap, for June 5, 2024
Highlights from on-the-air ham radio transmission on 147.045 MHz
For the 52nd installment of the Astro Net on 6/5/2024, Roy KD9RSE and Glenn KD9PNY got a late lift-off, but maneuvered into orbit long enough to circumnavigate the airwaves for a short while.
On solar activity:
As is his wont, Glenn KD9PNY reported on both the recent activity from the Sun, at this link, as the Solar Cycle 25 continues to show moderately high indices, which presumably is not unusual at or near the peak of a solar cycle. Here's a good site, at this link, for tracking solar activity.
And during these solar cycles, there is always the prospect for various flares and other ejecta from the Sun, which can be a usual concern for amateur radio operators. For a description of types of flares and their classification (as used by astronomers and solar physicists), go to this link.
Though solar activity still appears somewhat variable, it's still neat to view the disk of the Sun, as large sunspot groups do appear to be visible, even with leftover eclipse glasses or a #14 welder's face plate. If it's clear weather over the next many days, you could watch the daily progress of sunspots as they move across the face of the Sun. See spots run, at this link.
Just as important as knowing about the Sun and what it can hurl at us, it's also instructive to note that solar cycles depict not only the rise and fall of sunspot numbers, but what the cycles can reveal about climate here on Earth. While climate change is often the rage in media headlines, the Sun itself ought to command some attention in this regard, since its solar cycles, as tracked historically over decades, and its sunspots, as tracked methodically over centuries, coincide fairly well with observe changes in climate in various parts of the world. (Believe it or not, not all scientists agree on the the Sun's effects on Earth or the implications when there are lulls in cycles.) For a discussion of sunspot frequency and the phenomena that often appears to accompany them, go to this link.
On lunar activity:
The Moon, our nearest celestial neighbor, will be at its New phase the night after this Astro Net; that is, on 6/6; so, one will not be able to view it. (Of course, the only time to see the New Moon phase is during a total solar eclipse, when the Moon blocks the Sun, as seen from Earth, such as what happened on 4/8/24.)
By American colonial and native folklore, June's full phase is known as the Full Strawberry Moon, due to the ripening of that tart red fruit (great for pies and cakes and fine desserts). From the gastronomical back to the astronomical, this month's Full Moon is also the lowest Full Moon in the sky.
That is, this month is a special Solstice Moon (which we'll detail in the next Astro Net), which occurs just after the Summer Solstice. So, while the Sun is highest in the sky at that time in the day sky, the Moon appears lowest in the night sky.
On planet activity:
Glenn KD9PNY and Roy KD9RSE directed listeners where in a cloudless sky to view the planets; for this month, go to this link. In pre-dawn twilight, the planets Mercury, Jupiter, Mars, and Saturn rise at an angle up from the eastern horizon to the southeast. Mercury and Jupiter are close together (or, in conjunction), too, but are tough to view, mostly lost in the glare of the Sun before sunup.
On meteor activity:
Also in the east before sunrise will be the likelihood of seeing the Arietid meteor shower, on tap for mid-June; for a location map and description, go to this link. As mentioned previously on the Astro Net, while one needs no special equipment to view meteors and meteor showers by eye, mainly sporadic meteors may be visible after midnight on any clear night.
On other items:
Don KA9QJG alerted listeners to a recent FCC action, and read aloud an FCC notice, that announced the opening of its docket for public comment on the effect of solar activity on Earth's ionosphere. A description of this action and links for public comment can be accessed through this link via the ARRL.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KA9QJG Don
Once again, thoughts and prayers from the Astro Net to Don's wife, Betty.
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next regular Astro Net on Wednesday, June 19, 2024, at 8:00 p. m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
On solar activity:
As is his wont, Glenn KD9PNY reported on both the recent activity from the Sun, at this link, as the Solar Cycle 25 continues to show moderately high indices, which presumably is not unusual at or near the peak of a solar cycle. Here's a good site, at this link, for tracking solar activity.
And during these solar cycles, there is always the prospect for various flares and other ejecta from the Sun, which can be a usual concern for amateur radio operators. For a description of types of flares and their classification (as used by astronomers and solar physicists), go to this link.
Though solar activity still appears somewhat variable, it's still neat to view the disk of the Sun, as large sunspot groups do appear to be visible, even with leftover eclipse glasses or a #14 welder's face plate. If it's clear weather over the next many days, you could watch the daily progress of sunspots as they move across the face of the Sun. See spots run, at this link.
Just as important as knowing about the Sun and what it can hurl at us, it's also instructive to note that solar cycles depict not only the rise and fall of sunspot numbers, but what the cycles can reveal about climate here on Earth. While climate change is often the rage in media headlines, the Sun itself ought to command some attention in this regard, since its solar cycles, as tracked historically over decades, and its sunspots, as tracked methodically over centuries, coincide fairly well with observe changes in climate in various parts of the world. (Believe it or not, not all scientists agree on the the Sun's effects on Earth or the implications when there are lulls in cycles.) For a discussion of sunspot frequency and the phenomena that often appears to accompany them, go to this link.
On lunar activity:
The Moon, our nearest celestial neighbor, will be at its New phase the night after this Astro Net; that is, on 6/6; so, one will not be able to view it. (Of course, the only time to see the New Moon phase is during a total solar eclipse, when the Moon blocks the Sun, as seen from Earth, such as what happened on 4/8/24.)
By American colonial and native folklore, June's full phase is known as the Full Strawberry Moon, due to the ripening of that tart red fruit (great for pies and cakes and fine desserts). From the gastronomical back to the astronomical, this month's Full Moon is also the lowest Full Moon in the sky.
That is, this month is a special Solstice Moon (which we'll detail in the next Astro Net), which occurs just after the Summer Solstice. So, while the Sun is highest in the sky at that time in the day sky, the Moon appears lowest in the night sky.
On planet activity:
Glenn KD9PNY and Roy KD9RSE directed listeners where in a cloudless sky to view the planets; for this month, go to this link. In pre-dawn twilight, the planets Mercury, Jupiter, Mars, and Saturn rise at an angle up from the eastern horizon to the southeast. Mercury and Jupiter are close together (or, in conjunction), too, but are tough to view, mostly lost in the glare of the Sun before sunup.
On meteor activity:
Also in the east before sunrise will be the likelihood of seeing the Arietid meteor shower, on tap for mid-June; for a location map and description, go to this link. As mentioned previously on the Astro Net, while one needs no special equipment to view meteors and meteor showers by eye, mainly sporadic meteors may be visible after midnight on any clear night.
On other items:
Don KA9QJG alerted listeners to a recent FCC action, and read aloud an FCC notice, that announced the opening of its docket for public comment on the effect of solar activity on Earth's ionosphere. A description of this action and links for public comment can be accessed through this link via the ARRL.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KA9QJG Don
Once again, thoughts and prayers from the Astro Net to Don's wife, Betty.
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next regular Astro Net on Wednesday, June 19, 2024, at 8:00 p. m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
Astro Net recap, for May 22, 2024
Highlights from on-the-air ham radio transmission on 147.045 MHz
For the 51st installment of the Astro Net on 5/22/2024, Roy KD9RSE and Glenn KD9PNY launched the Net's golden anniversary (plus one) on-the-air. Unfortunately, the signal from Roy KD9RSE was somewhat muddled and diminished on receipt by most check-ins (for some reason); so, a quick suborbital version of the Astro Net was launched to highlight a few items of the daytime and nighttime skies.
On solar activity:
Glenn KD9PNY reported on both the recent activity from the Sun, at this link as the solar cycle continues to show relatively high indices (still an indication of the Cycle 25 gone ape), and, on the appearance of a long filament across the face of the Sun, which became a spectacular prominence.
Though solar activity is somewhat variable, there does not appear to be indications (as of this post) of probable auroras visible from the KA9QJG repeater area. Still, it's neat to view the disk of the Sun, as large sunspot groups do appear to be visible, even with leftover eclipse glasses or a #14 welder's face plate.
On lunar activity:
The Moon, our nearest celestial neighbor, will be at its Full phase the night after this Astro Net; that is, on 5/23. If the weather is clear, it ought to make for a bright white sight as it lifts itself above the local horizon and clears the trees after sundown. One can always count on the Full Moon to rise in the East as the Sun goes down in the West.
By American colonial and native folklore, May's full phase is known as the Full Flower Moon or the Budding Moon or the Planting Moon, all suitable names for that bright white orb that shines down on the May flowers brought forth by April showers.
On planet activity:
Glenn KD9PNY and Roy KD9RSE directed listeners where in a cloudless sky to view the planets. For the planets and the Moon on display in the latter part of May, go to this link. Note that the Moon will appear very close to Saturn in the eastern sky before sunup on the morning of May 31. View it with a good, steady binocular and an unobstructed eastern horizon.
Also, by month's end, one can see a line of planets, Mercury, Mars, and Saturn, rising at an angle up from the eastern horizon in pre-dawn twilight. Jupiter and Venus are close together, too, but are lost in the glare of the Sun before sunup.
On meteor activity:
While one needs no special equipment to view meteors and meteor showers by eye, mainly sporadic meteors may be visible after midnight on any clear night. For this month, though, perhaps some sporadic meteors left over from the eta Aquariid shower, which peaked earlier this month of May, may be visible, out of the constellation Aquarius.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KA9QJG Don
K9QKE Tim
Thoughts and prayers from the Astro Net to Don's wife, Betty.
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next regular Astro Net on Wednesday, June 5, 2024, at 8:00 p. m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
On solar activity:
Glenn KD9PNY reported on both the recent activity from the Sun, at this link as the solar cycle continues to show relatively high indices (still an indication of the Cycle 25 gone ape), and, on the appearance of a long filament across the face of the Sun, which became a spectacular prominence.
Though solar activity is somewhat variable, there does not appear to be indications (as of this post) of probable auroras visible from the KA9QJG repeater area. Still, it's neat to view the disk of the Sun, as large sunspot groups do appear to be visible, even with leftover eclipse glasses or a #14 welder's face plate.
On lunar activity:
The Moon, our nearest celestial neighbor, will be at its Full phase the night after this Astro Net; that is, on 5/23. If the weather is clear, it ought to make for a bright white sight as it lifts itself above the local horizon and clears the trees after sundown. One can always count on the Full Moon to rise in the East as the Sun goes down in the West.
By American colonial and native folklore, May's full phase is known as the Full Flower Moon or the Budding Moon or the Planting Moon, all suitable names for that bright white orb that shines down on the May flowers brought forth by April showers.
On planet activity:
Glenn KD9PNY and Roy KD9RSE directed listeners where in a cloudless sky to view the planets. For the planets and the Moon on display in the latter part of May, go to this link. Note that the Moon will appear very close to Saturn in the eastern sky before sunup on the morning of May 31. View it with a good, steady binocular and an unobstructed eastern horizon.
Also, by month's end, one can see a line of planets, Mercury, Mars, and Saturn, rising at an angle up from the eastern horizon in pre-dawn twilight. Jupiter and Venus are close together, too, but are lost in the glare of the Sun before sunup.
On meteor activity:
While one needs no special equipment to view meteors and meteor showers by eye, mainly sporadic meteors may be visible after midnight on any clear night. For this month, though, perhaps some sporadic meteors left over from the eta Aquariid shower, which peaked earlier this month of May, may be visible, out of the constellation Aquarius.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KA9QJG Don
K9QKE Tim
Thoughts and prayers from the Astro Net to Don's wife, Betty.
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next regular Astro Net on Wednesday, June 5, 2024, at 8:00 p. m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
Astro Net recap, for May 8, 2024
Highlights from on-the-air ham radio transmission on 147.045 MHz
For the 50th installment of the Astro Net on 5/8/2024, Roy KD9RSE and Glenn KD9PNY launched the Net's golden anniversary on-the-air. Thanks for the chance to cruise into orbit once again and be heard twice monthly via the KA9QJG repeater, and, thanks to those who turn on, tune in, and key up to the Astro Net!
Highlights in this anniversary installment:
- Sun goes ape in Cycle 25!
- Flares, flares, and now a CME!
- Saturn and Moon meet in May!
- Don's dumb questions!
On solar activity:
With our 50th successful launch of the Astro Net, what better way to spend a golden anniversary than to talk about that golden orb that gives light to the day, the Sun?
Glenn KD9PNY reported a slew of big eruptions from the Sun, as solar activity has ramped up in recent days, not unusual in a solar cycle, but unexpected at this point. In his words: "The Sun has gone ape!" For the Astro Net, Roy KD9RSE dubbed these exciting solar times in Cycle 25 as Solar Max Ape.
Part of the big excitement is a huge sunspot group (an image at this link), which some scientists say rivals the apparent size and intensity of the sunspot group associated with the Carrington Event of 1859. As of this posting, it remains to be seen how disruptive the latest and current solar activity may be; but, radio disruptions are occurring and auroras are possible.
These recent flare activities are well classified, at this link, so that scientists and technicians can determine how best to react to potential disruption of communications.
Btw, if you have any solar eclipse glasses left over from last month's total eclipse or a welder's faceplate, take a look through them at the Sun. On the right half of the solar disk appears that huge sunspot group. See it for yourself. And maybe by this Friday night (5/10), weather permitting, look for an aurora.
On planet activity:
Glenn KD9PNY and Roy KD9RSE directed listeners where in a cloudless sky to view the planets. For the planets and the Moon on display this month of May, go to this link. Note that the Moon will appear very close to Saturn in the eastern sky before sunrise on the morning of May 31. View it with a good binocular.
Also, by month's end, one can see a line of planets, Mercury, Mars, and Saturn, rising at an angle up from the eastern horizon in pre-dawn twilight.
On meteor activity:
While one needs no special equipment to view meteors and meteor showers by eye, mainly sporadic meteors may be visible after midnight on any clear night. For this month, though, perhaps some sporadic meteors left over from the eta Aquariid shower, which peaked earlier this month of May, may be visible, out of the constellation Aquarius.
On other items:
There will another close approach this month on May 31, that of Mercury and Uranus, at this link. It may be a challenge to see them together in pre-dawn twilight, but look to the east with a steady binocular before sunrise to view this planetary conjunction, when two (or more) planets meet in the sky.
Don KA9QJG ran a quick quiz on-the-air and asked listeners in what year Albert Einstein published his theory of relativity. At first, one might think this was a trick question; but, only one year for this theory was asked. Einstein actually published two theories: Special Relativity, first published in 1905, and then General Relativity, published in 1915 (which was the answer sought). A summary of both theories is found at this link.
Don KA9QJG also claimed he had a few dumb questions to ask. (Note to Don: There are usually more dumb answers than there are dumb questions; just the same, it's still good to ask.) And none of us claim to know everything.
On Don's dumb questions:
Don KA9QJG asked ~
How does all this solar activity affect GPS?
To answer this best, at this link appears an overview of the workings of GPS and its various iterations; at this link and this link are examples of what damage and disruption can occur.
How can we know if the radio bands are Ok?
Roy KD9RSE responded that it may be possible, at this link of maximum usable frequencies (MUF), to see changes over time of the relative and possible openings of bands around the world. That may help to see where and when propagation may be good on various frequencies. At this link is an explanation of MUF. Here's how to read that MUF map, at this link.
Are there things in science that change or are no longer true and need to be revised?
As Roy KD9RSE says: Theories comes and theories go. Science gets revised from time to time, as new observations and better interpretations replace outdated perspectives. Example of past "science" that passed into history: the Phlogiston Theory and the Steady-State Theory. Maybe one day the current Big Bang Theory will be chucked for something newer and better, perhaps due to observations last year by the Webb Space Telescope that detected way-distant galaxies.
If there are meteors seen flashing across the sky, can radio operators do meteor scatter?
There is the prospect of employing ham equipment to monitor any faraway QSOs as a result of meteor scatter, though Roy KD9RSE maintains it may take coordination and an expensive set-up to accomplish it well; however, it is certainly a possible way to make long-range radio contacts. As meteors are ionized trails across the sky, those remnant trails of passing meteors in the atmosphere may act briefly to reflect radio signals. But one would need lots of meteors.
How can we reduce noise or improve reception on-the-air?
With all of the static that space weather and Earth's own atmosphere might send our way over the airwaves, Roy KD9RSE (not an antenna expert or ham-radio genius) suggested his own three ways to improve the signal and lessen the noise on-the-air: install ferrite beads, switch to differently polarized antennas (as feasible), or enable or disable the rig's attenuator (as needed).
After the Astro Net closed, Don KA9QJG played an audio segment of the recent video posted by Dr. Tamitha Skov, the Space Weather Woman.
Thanks for the last 50 successful launches, and, thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KA9QJG Don
KD9IQU Nick
KB9JVW Brad
KD9HOK Greg
KD9PNS Karl
Thoughts and prayers from the Astro Net to Don's wife, Betty.
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next regular Astro Net on Wednesday, May 22, 2024, at 8:00 p. m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
Highlights in this anniversary installment:
- Sun goes ape in Cycle 25!
- Flares, flares, and now a CME!
- Saturn and Moon meet in May!
- Don's dumb questions!
On solar activity:
With our 50th successful launch of the Astro Net, what better way to spend a golden anniversary than to talk about that golden orb that gives light to the day, the Sun?
Glenn KD9PNY reported a slew of big eruptions from the Sun, as solar activity has ramped up in recent days, not unusual in a solar cycle, but unexpected at this point. In his words: "The Sun has gone ape!" For the Astro Net, Roy KD9RSE dubbed these exciting solar times in Cycle 25 as Solar Max Ape.
Part of the big excitement is a huge sunspot group (an image at this link), which some scientists say rivals the apparent size and intensity of the sunspot group associated with the Carrington Event of 1859. As of this posting, it remains to be seen how disruptive the latest and current solar activity may be; but, radio disruptions are occurring and auroras are possible.
These recent flare activities are well classified, at this link, so that scientists and technicians can determine how best to react to potential disruption of communications.
Btw, if you have any solar eclipse glasses left over from last month's total eclipse or a welder's faceplate, take a look through them at the Sun. On the right half of the solar disk appears that huge sunspot group. See it for yourself. And maybe by this Friday night (5/10), weather permitting, look for an aurora.
On planet activity:
Glenn KD9PNY and Roy KD9RSE directed listeners where in a cloudless sky to view the planets. For the planets and the Moon on display this month of May, go to this link. Note that the Moon will appear very close to Saturn in the eastern sky before sunrise on the morning of May 31. View it with a good binocular.
Also, by month's end, one can see a line of planets, Mercury, Mars, and Saturn, rising at an angle up from the eastern horizon in pre-dawn twilight.
On meteor activity:
While one needs no special equipment to view meteors and meteor showers by eye, mainly sporadic meteors may be visible after midnight on any clear night. For this month, though, perhaps some sporadic meteors left over from the eta Aquariid shower, which peaked earlier this month of May, may be visible, out of the constellation Aquarius.
On other items:
There will another close approach this month on May 31, that of Mercury and Uranus, at this link. It may be a challenge to see them together in pre-dawn twilight, but look to the east with a steady binocular before sunrise to view this planetary conjunction, when two (or more) planets meet in the sky.
Don KA9QJG ran a quick quiz on-the-air and asked listeners in what year Albert Einstein published his theory of relativity. At first, one might think this was a trick question; but, only one year for this theory was asked. Einstein actually published two theories: Special Relativity, first published in 1905, and then General Relativity, published in 1915 (which was the answer sought). A summary of both theories is found at this link.
Don KA9QJG also claimed he had a few dumb questions to ask. (Note to Don: There are usually more dumb answers than there are dumb questions; just the same, it's still good to ask.) And none of us claim to know everything.
On Don's dumb questions:
Don KA9QJG asked ~
How does all this solar activity affect GPS?
To answer this best, at this link appears an overview of the workings of GPS and its various iterations; at this link and this link are examples of what damage and disruption can occur.
How can we know if the radio bands are Ok?
Roy KD9RSE responded that it may be possible, at this link of maximum usable frequencies (MUF), to see changes over time of the relative and possible openings of bands around the world. That may help to see where and when propagation may be good on various frequencies. At this link is an explanation of MUF. Here's how to read that MUF map, at this link.
Are there things in science that change or are no longer true and need to be revised?
As Roy KD9RSE says: Theories comes and theories go. Science gets revised from time to time, as new observations and better interpretations replace outdated perspectives. Example of past "science" that passed into history: the Phlogiston Theory and the Steady-State Theory. Maybe one day the current Big Bang Theory will be chucked for something newer and better, perhaps due to observations last year by the Webb Space Telescope that detected way-distant galaxies.
If there are meteors seen flashing across the sky, can radio operators do meteor scatter?
There is the prospect of employing ham equipment to monitor any faraway QSOs as a result of meteor scatter, though Roy KD9RSE maintains it may take coordination and an expensive set-up to accomplish it well; however, it is certainly a possible way to make long-range radio contacts. As meteors are ionized trails across the sky, those remnant trails of passing meteors in the atmosphere may act briefly to reflect radio signals. But one would need lots of meteors.
How can we reduce noise or improve reception on-the-air?
With all of the static that space weather and Earth's own atmosphere might send our way over the airwaves, Roy KD9RSE (not an antenna expert or ham-radio genius) suggested his own three ways to improve the signal and lessen the noise on-the-air: install ferrite beads, switch to differently polarized antennas (as feasible), or enable or disable the rig's attenuator (as needed).
After the Astro Net closed, Don KA9QJG played an audio segment of the recent video posted by Dr. Tamitha Skov, the Space Weather Woman.
Thanks for the last 50 successful launches, and, thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KA9QJG Don
KD9IQU Nick
KB9JVW Brad
KD9HOK Greg
KD9PNS Karl
Thoughts and prayers from the Astro Net to Don's wife, Betty.
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next regular Astro Net on Wednesday, May 22, 2024, at 8:00 p. m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
Astro Net recap, for April 24, 2024
Highlights from on-the-air ham radio transmission on 147.045 MHz
For the 49th installment of the Astro Net on 4/24/2024, Roy KD9RSE and Glenn KD9PNY offered a few perspectives on the North American total solar eclipse of April 8, 2024, reviewed what to see in the night sky, and, invited others to share their own observations and experiences.
On the recent solar eclipse:
While both Roy KD9RSE and Glenn KD9PNY had the distinct chance to observe the total solar eclipse on April 8, 2024, Glenn KD9PNY was located In Terre Haute, IN, and Roy KD9RSE was located in West Frankfort, IL (at the same spot he saw the last eclipse on August 21, 2017). Seeing the recent eclipse prompted both to remark on a few distinctive features that are worth observing even when Sun is not eclipsed; namely, prominences off the edge of the Sun, which are huge plumes of rarefied gas seen from a perspective at the edge of the Sun's disk. By contrast, a filament is the same huge plume, but seen across the face of the Sun.
On other solar activity:
As Cycle 25 is still at or near its peak, many sunspots now are readily observed, as Glenn KD9PNY reported. Recent activity posted at this link.
On planet activity:
For this Spring season, see where these planets may show up in the sky at this link (weather permitting).
On meteor activity:
For the balance of the month of April, meteor activity at this link includes the Lyrids (emanating from the constellation Lyra (the Harp) and the Eta Aquariids, radiating from the star pattern Aquarius (the Water-Bearer).
On other items:
Don KA9QJG asked about binoculars and lasers. He alluded to nitrogen once used in military optics, and, indeed, a so-called nitrogen purge is used, but to reduce fogging of lenses. While red lasers and green lasers are fine for gun sights and green lasers have also been used for gun sights and as night-sky pointers, use of the latter, when directed at airplanes, is a FAA offense, with fines and possible imprisonment up to five years. (Btw, there are also yellow lasers for some medical uses and blue lasers for industrial and hobby use.)
Don KA9QJG also asked about the feasibility of laser communication in the field. While laser communication with fiber optics is a mainstay in wired communication, as Glenn KD9PNY pointed out, Roy KD9RSE deferred to other sources to describe what is known as optical wireless, what may be commercially current, and what may be possible in advanced space communications.
As a continuation, Don KA9QJG asked about the principle and use of night-vision goggles. Roy KD9RSE indicated some of the differences; namely, that of image intensifiers versus thermal imagers. As a segue to imaging objects in the dark, there was some discussion on the use of magnification, such as binoculars.
For those interested in taking up the hobby of astronomy and want to observe the night sky with optical aid, binoculars and telescopes offer that advantage. Here's an overview of binoculars versus telescopes for astronomical observing. For buying telescopes and binoculars, there are retail sources (such as Astromart) and aftermarket sources (such as the Cloudy Nights forum's Classified section).
Don KA9QJG also asked about remote observing, which includes the prospect of instrumented telescopes. Roy KD9RSE that already there are outlets for remote-controlled telescopes. At this link is one such example of a remote-control set-up. In addition, there are subscription services to Internet-accessed telescopes, and even time-shares for advanced observing among scientists.
Many different ways to enjoy the night sky, and all of them do not have to involve fancy apparatus or expensive equipment. If one wants to "try before you buy" or just have a friendly look at the night sky, one might visit a star party, to browse equipment and look through a variety of scopes. Check out this list of upcoming gigs in 2024.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KA9QJG Don
W9ABN Ed
KB9JVW Brad
KD9ZVW
KD9HOK Greg
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next regular Astro Net on Wednesday, May 8, 2024, at 8:00 p. m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
On the recent solar eclipse:
While both Roy KD9RSE and Glenn KD9PNY had the distinct chance to observe the total solar eclipse on April 8, 2024, Glenn KD9PNY was located In Terre Haute, IN, and Roy KD9RSE was located in West Frankfort, IL (at the same spot he saw the last eclipse on August 21, 2017). Seeing the recent eclipse prompted both to remark on a few distinctive features that are worth observing even when Sun is not eclipsed; namely, prominences off the edge of the Sun, which are huge plumes of rarefied gas seen from a perspective at the edge of the Sun's disk. By contrast, a filament is the same huge plume, but seen across the face of the Sun.
On other solar activity:
As Cycle 25 is still at or near its peak, many sunspots now are readily observed, as Glenn KD9PNY reported. Recent activity posted at this link.
On planet activity:
For this Spring season, see where these planets may show up in the sky at this link (weather permitting).
On meteor activity:
For the balance of the month of April, meteor activity at this link includes the Lyrids (emanating from the constellation Lyra (the Harp) and the Eta Aquariids, radiating from the star pattern Aquarius (the Water-Bearer).
On other items:
Don KA9QJG asked about binoculars and lasers. He alluded to nitrogen once used in military optics, and, indeed, a so-called nitrogen purge is used, but to reduce fogging of lenses. While red lasers and green lasers are fine for gun sights and green lasers have also been used for gun sights and as night-sky pointers, use of the latter, when directed at airplanes, is a FAA offense, with fines and possible imprisonment up to five years. (Btw, there are also yellow lasers for some medical uses and blue lasers for industrial and hobby use.)
Don KA9QJG also asked about the feasibility of laser communication in the field. While laser communication with fiber optics is a mainstay in wired communication, as Glenn KD9PNY pointed out, Roy KD9RSE deferred to other sources to describe what is known as optical wireless, what may be commercially current, and what may be possible in advanced space communications.
As a continuation, Don KA9QJG asked about the principle and use of night-vision goggles. Roy KD9RSE indicated some of the differences; namely, that of image intensifiers versus thermal imagers. As a segue to imaging objects in the dark, there was some discussion on the use of magnification, such as binoculars.
For those interested in taking up the hobby of astronomy and want to observe the night sky with optical aid, binoculars and telescopes offer that advantage. Here's an overview of binoculars versus telescopes for astronomical observing. For buying telescopes and binoculars, there are retail sources (such as Astromart) and aftermarket sources (such as the Cloudy Nights forum's Classified section).
Don KA9QJG also asked about remote observing, which includes the prospect of instrumented telescopes. Roy KD9RSE that already there are outlets for remote-controlled telescopes. At this link is one such example of a remote-control set-up. In addition, there are subscription services to Internet-accessed telescopes, and even time-shares for advanced observing among scientists.
Many different ways to enjoy the night sky, and all of them do not have to involve fancy apparatus or expensive equipment. If one wants to "try before you buy" or just have a friendly look at the night sky, one might visit a star party, to browse equipment and look through a variety of scopes. Check out this list of upcoming gigs in 2024.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KA9QJG Don
W9ABN Ed
KB9JVW Brad
KD9ZVW
KD9HOK Greg
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next regular Astro Net on Wednesday, May 8, 2024, at 8:00 p. m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
Astro Net recap, for April 10, 2024
Highlights from on-the-air ham radio transmission on 147.045 MHz
For the 48th installment of the Astro Net on 4/10/2024, Roy KD9RSE and Glenn KD9RSE offered their perspectives on the North American total solar eclipse of April 8, 2024, and, invited others to share their own observations and experiences.
On the recent solar eclipse:
Both Roy KD9RSE and Glenn KD9PNY had the distinct chance to observe the total solar eclipse on April 8, 2024. Glenn KD9PNY was located In Terre Haute, IN, and witnessed about three minutes of totality; Roy KD9RSE was located in West Frankfort, IL (at the same spot he saw the last eclipse on August 21, 2017), and witnessed about four minutes of totality. The closer to the centerline of totality, the longer the eclipse; for IL and IN, the average for totality was just over four minutes at the centerline.
Bill KC9MDS, Jim W9JOM, Greg KD9HOK, and Brad KB9JVW all shared their own experiences from that day of the eclipse.
As noted in previous Net installments, there were several safe ways to see that partial phases prior to and after the total solar eclipse: by looking at it through eclipse glasses or through a welder's faceplate, or, by looking for it on the ground.
For the partial phases, one could buy and use a pair of mylar eclipse glasses, which were relatively cheap at several department-store chains and at home-improvement stores.
One could have viewed the partial phases (before and after totality) through a #14 welder's glass (since other shades of glass would not likely block enough sunlight). Perhaps for the next eclipse over Spain in 2024 or across Australia in 2028, one might pack a faceplate from a plumbing supply outlet (like Airgas; store locator at this link).
One could also assemble and a pinhole projector box, or, simply look for crescent suns on the ground, where sunlight filters through the leaves of trees or through objects that have small holes (like a kitchen colander). At this link was an example of what you might have seen.
At his observing site, Roy KD9RSE set up two telescopes. One telescope was set up for continuous digital photography; inserted (below) are three of his digital photos from the eclipse: Lunar ingress, showing the diamond-ring effect on the Sun's left side, as the Moon covers the last of the solar disk; eclipse totality, with a jet plane captured at the top of the frame; and lunar egress, showing the diamond-ring effect on the Sun's right side, as the Moon moves off and uncovers the solar disk. (Note: This is the diamond-ring effect.) The other telescope was set up for a live-video feed via Zoom. Despite a touchy Wi-Fi signal from his vidcam, no available Internet connectivity, and a shaky Zoom connection, the eclipse was still viewed by his students in Chicago.
In general, during that brief interlude of eclipse darkness the sky's appearance changes. Though darkness sweeps in, it's not the inky blackness of nighttime; rather, the sky around the eclipsed Sun can take on a hue of deep blue (or even purple) with shades of gray mixed in as well. If the sky at an eclipse location appears clear (with no clouds), the actual physical color of the daytime sky (as seen from within the Moon's shadow) may likely depend a variety of factors, such as the presence of aerosols (like windblown dust or particulate pollution), the amount of the air's water vapor, and the level of natural scattering of diffuse sunlight. (Some involved explanations have been offered in recent decades, at this link.)
And unlike nighttime (or even nautical twilight), the entire horizon (a full 360 degrees) was all lit up, as if sunrise were to occur everywhere at once. That's a unique effect only seen from within the shadow of the Moon during a total solar eclipse.
From his eclipse location in West Frankfort, IL, Roy KD9RSE noted that the sky appeared as the color of indigo, a pleasing blue hue blended with a mild violet shade (see his site picture, below right).
On the recent solar eclipse:
Both Roy KD9RSE and Glenn KD9PNY had the distinct chance to observe the total solar eclipse on April 8, 2024. Glenn KD9PNY was located In Terre Haute, IN, and witnessed about three minutes of totality; Roy KD9RSE was located in West Frankfort, IL (at the same spot he saw the last eclipse on August 21, 2017), and witnessed about four minutes of totality. The closer to the centerline of totality, the longer the eclipse; for IL and IN, the average for totality was just over four minutes at the centerline.
Bill KC9MDS, Jim W9JOM, Greg KD9HOK, and Brad KB9JVW all shared their own experiences from that day of the eclipse.
As noted in previous Net installments, there were several safe ways to see that partial phases prior to and after the total solar eclipse: by looking at it through eclipse glasses or through a welder's faceplate, or, by looking for it on the ground.
For the partial phases, one could buy and use a pair of mylar eclipse glasses, which were relatively cheap at several department-store chains and at home-improvement stores.
One could have viewed the partial phases (before and after totality) through a #14 welder's glass (since other shades of glass would not likely block enough sunlight). Perhaps for the next eclipse over Spain in 2024 or across Australia in 2028, one might pack a faceplate from a plumbing supply outlet (like Airgas; store locator at this link).
One could also assemble and a pinhole projector box, or, simply look for crescent suns on the ground, where sunlight filters through the leaves of trees or through objects that have small holes (like a kitchen colander). At this link was an example of what you might have seen.
At his observing site, Roy KD9RSE set up two telescopes. One telescope was set up for continuous digital photography; inserted (below) are three of his digital photos from the eclipse: Lunar ingress, showing the diamond-ring effect on the Sun's left side, as the Moon covers the last of the solar disk; eclipse totality, with a jet plane captured at the top of the frame; and lunar egress, showing the diamond-ring effect on the Sun's right side, as the Moon moves off and uncovers the solar disk. (Note: This is the diamond-ring effect.) The other telescope was set up for a live-video feed via Zoom. Despite a touchy Wi-Fi signal from his vidcam, no available Internet connectivity, and a shaky Zoom connection, the eclipse was still viewed by his students in Chicago.
In general, during that brief interlude of eclipse darkness the sky's appearance changes. Though darkness sweeps in, it's not the inky blackness of nighttime; rather, the sky around the eclipsed Sun can take on a hue of deep blue (or even purple) with shades of gray mixed in as well. If the sky at an eclipse location appears clear (with no clouds), the actual physical color of the daytime sky (as seen from within the Moon's shadow) may likely depend a variety of factors, such as the presence of aerosols (like windblown dust or particulate pollution), the amount of the air's water vapor, and the level of natural scattering of diffuse sunlight. (Some involved explanations have been offered in recent decades, at this link.)
And unlike nighttime (or even nautical twilight), the entire horizon (a full 360 degrees) was all lit up, as if sunrise were to occur everywhere at once. That's a unique effect only seen from within the shadow of the Moon during a total solar eclipse.
From his eclipse location in West Frankfort, IL, Roy KD9RSE noted that the sky appeared as the color of indigo, a pleasing blue hue blended with a mild violet shade (see his site picture, below right).
With a Yaesu FT-891 rig and a delta loop antenna, Roy KD9RSE also conducted a radio experiment during the eclipse, and sought to monitor signals from automated radio beacons that send 10-second CW bursts successively on the 14.1 MHz frequency every 3 minutes of every hour of the day. Since the presence of the 20-meter band is more pronounced during the day than at night, the small experiment sought to record CW signals during the eclipse, to determine if any attenuation of beacons signals during daylight hours might occur as the Moon's shadow passed through Earth’s atmosphere.
If successful (and barring any unforeseen interference with propagation), perhaps the 20-m band (more of a “daytime” band) would fade momentarily in propagation in response to the passage of the Moon's shadow. Results of that little experiment are forthcoming.
On other solar activity:
As Cycle 25 is still at or near its peak, sunspots are readily observed, as Glenn KD9PNY reported. Recent activity posted at this link.
On planet activity:
From his eclipse observing location in Terre Haute, Glenn KD9PNY noted the positions of the bright planets displayed on either side of the Sun, as seen during the eclipse. Venus was visible to the lower right of the Sun, as Saturn and Mars huddled together closer to the local horizon; Jupiter was visible to the left of the Sun. (See how all became visible during the eclipse at this link.)
From his eclipse observing location in West Frankfort, Roy KD9RSE observed Jupiter and Saturn on either of the Sun, too; while other planets were likely visible in the sky at his observing site, tall trees at this location hid Mars and Saturn from his direct viewing.
For other times in this Spring season, see where these planets may show up in the sky at this link (weather permitting).
On other items with a solar eclipse:
The most significant characteristic of an eclipse is the temporary darkness during daylight that occurs when the Moon's shadow sweeps through Earth's atmosphere. The sudden lack of sunlight can influence the activity of domesticated and wild animals. As a result of a question from Don KA9QJG in the last installment of the Astro Net, there are definite effects on domesticated animals and wildlife during a total solar eclipse. That is, nature responds to the phenomenon of a solar eclipse in odd (but not unexpected) ways. The last time a total eclipse swept across this area was in August 2017; many articles were written then and posted about what might happen to animals. Here (below) are some samples.
At this link, this link and this link are overviews of animal behavior during a total solar eclipse: Horses will amble to the barn, cattle may start to low in the pasture, birds start to roost, chickens and roosters stop pecking, crickets start to chirp, bats may take flight while bees end their flight and wander aimlessly on the ground. And when the Moon's shadow passes, animals will pick up where they left off: Horses and cattle will head out to pasture, birds will sing, chickens will peck, roosters will crow, crickets will not chirp, bats will roost, and bees will take flight.
For pets, this link describes what dogs and cats might experience. But dogs and cats will likely be fine; they don't need mylar eclipse glasses, since they don't stare at the Sun, unlike humans. Btw, at this link are superstitions, folklore, and odd tales of human behavior connected to solar eclipses. Finally, and at this link are other odd things humans have been known to do during an eclipse.
Other things that humans might do during an eclipse is get married or tend gardens. Greg KD9HOK reported that seeds in his recently planted garden have shown fast germination and attributed that to this recent eclipse. At this link are various usual ways to increase the rate of seed germination; but, at this link Roy KD9RSE found that there appears to be some past investigation into the indirect effect of solar eclipses on seed germination.
Don KA9QJG read aloud an account of "Sun-grazing" comets (aka Kreutzian comets, after Heinrich Kreutz) that might be seen during an eclipse. At this link is the observation of one such object.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KA9QJG Don
KC9MDS Bill
W9JOM Jim
KF9ER Paul
KD9HOK Greg
KB9JVW Brad
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next regular Astro Net on Wednesday, April 24, 2024, at 8:00 p. m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
If successful (and barring any unforeseen interference with propagation), perhaps the 20-m band (more of a “daytime” band) would fade momentarily in propagation in response to the passage of the Moon's shadow. Results of that little experiment are forthcoming.
On other solar activity:
As Cycle 25 is still at or near its peak, sunspots are readily observed, as Glenn KD9PNY reported. Recent activity posted at this link.
On planet activity:
From his eclipse observing location in Terre Haute, Glenn KD9PNY noted the positions of the bright planets displayed on either side of the Sun, as seen during the eclipse. Venus was visible to the lower right of the Sun, as Saturn and Mars huddled together closer to the local horizon; Jupiter was visible to the left of the Sun. (See how all became visible during the eclipse at this link.)
From his eclipse observing location in West Frankfort, Roy KD9RSE observed Jupiter and Saturn on either of the Sun, too; while other planets were likely visible in the sky at his observing site, tall trees at this location hid Mars and Saturn from his direct viewing.
For other times in this Spring season, see where these planets may show up in the sky at this link (weather permitting).
On other items with a solar eclipse:
The most significant characteristic of an eclipse is the temporary darkness during daylight that occurs when the Moon's shadow sweeps through Earth's atmosphere. The sudden lack of sunlight can influence the activity of domesticated and wild animals. As a result of a question from Don KA9QJG in the last installment of the Astro Net, there are definite effects on domesticated animals and wildlife during a total solar eclipse. That is, nature responds to the phenomenon of a solar eclipse in odd (but not unexpected) ways. The last time a total eclipse swept across this area was in August 2017; many articles were written then and posted about what might happen to animals. Here (below) are some samples.
At this link, this link and this link are overviews of animal behavior during a total solar eclipse: Horses will amble to the barn, cattle may start to low in the pasture, birds start to roost, chickens and roosters stop pecking, crickets start to chirp, bats may take flight while bees end their flight and wander aimlessly on the ground. And when the Moon's shadow passes, animals will pick up where they left off: Horses and cattle will head out to pasture, birds will sing, chickens will peck, roosters will crow, crickets will not chirp, bats will roost, and bees will take flight.
For pets, this link describes what dogs and cats might experience. But dogs and cats will likely be fine; they don't need mylar eclipse glasses, since they don't stare at the Sun, unlike humans. Btw, at this link are superstitions, folklore, and odd tales of human behavior connected to solar eclipses. Finally, and at this link are other odd things humans have been known to do during an eclipse.
Other things that humans might do during an eclipse is get married or tend gardens. Greg KD9HOK reported that seeds in his recently planted garden have shown fast germination and attributed that to this recent eclipse. At this link are various usual ways to increase the rate of seed germination; but, at this link Roy KD9RSE found that there appears to be some past investigation into the indirect effect of solar eclipses on seed germination.
Don KA9QJG read aloud an account of "Sun-grazing" comets (aka Kreutzian comets, after Heinrich Kreutz) that might be seen during an eclipse. At this link is the observation of one such object.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KA9QJG Don
KC9MDS Bill
W9JOM Jim
KF9ER Paul
KD9HOK Greg
KB9JVW Brad
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next regular Astro Net on Wednesday, April 24, 2024, at 8:00 p. m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
Astro Net recap, for March 20, 2024
Highlights from on-the-air ham radio transmission on 147.045 MHz
For the 47th installment of the Astro Net on 3/20/2024, Roy KD9RSE started off with a preview of topics, namely, the upcoming solar eclipse in the daytime sky and things to spot in the nighttime sky.
On planet activity:
Glenn KD9PNY informed listeners of current sky conditions and positions of the bright planets; specifically, where listeners can view Venus, Jupiter, and Saturn, at this link (weather permitting, of course).
On solar activity:
Though there are sunspots aplenty to observe, as Glenn KD9PNY reports, there are spots that appear to be active with flares. Recent activity posted at this link.
On the upcoming solar eclipse:
As in previous Nets, Roy KD9RSE and Glenn KD9PNY once again urged listeners and check-ins to take advantage of the chance to see a total solar eclipse on April 8, 2024. Various sites have convenient maps of the path of totality here. As mentioned in the previous several Net recaps, one can also become part of worldwide experiment in radio propagation, at this link, which the ARRL has sponsored during previous solar eclipses.
Though it's now just over two weeks away for the total solar eclipse, one may want still try to find a good location to view it, as motorists will jam the roadways that day (especially once the Moon's shadow has passed). Of course, exercise good common sense in your choice of a last-minute viewing spot, if you choose to risk the traffic jams or the prospect of meeting law enforcement.
As in previous Net installments, here's a repeat (below) of two safe ways to see that partial phases prior to and after the total solar eclipse: by looking for it on the ground, or, by looking at it through a welder's faceplate.
Here's one safe way (and good for the kids to try), using no fancy apparatus. During the partial phase that leads up to the total solar eclipse (or, during the ingress), the Moon only blocks a portion of the Sun; so, an uncommon "crescent Sun" is visible. Viewing the total solar eclipse can be done safely, but with non-optical techniques, such as with a pinhole projector box. Also, look for crescent suns on the ground, where sunlight filters through the leaves of trees or through objects that have small holes (like a kitchen colander). At this link is an example of what you might see.
Here's the other safe way, using a handheld glass filter. One can hold a #14 welder's glass (and only #14 glass, since other shades don't block out enough sunlight) up in front of one's face to view the partial phases of the eclipse (before and after totality). A faceplate may be available from a plumbing supply outlet (like Airgas; store locator at this link).
Hold the faceplate in front of your eyes to take a brief glimpse of the Sun during the partial phases of the eclipse leading up and trailing away from the actual total eclipse. Of course, through a welder's glass, the crescent Sun will appear green.
Solar eclipse glasses may be Ok to use to view the partial phases of the eclipse. But when the Moon blocks the Sun, then the mylar glasses are not needed; one can then and should look at the eclipsed Sun directly. It's a glorious sight to see!
Now only when the Moon continues on in its orbit (or, during the egress) and uncovers the Sun, one should then don again the mylar glasses to view the Sun. Btw, not all eclipse glasses are made the same, as some are made of darkened plastic or of thin mylar; not all eclipse glasses may be Sun-worthy.
On lunar activity:
Like we asserted at the last Astro Net, do note that if there's a solar eclipse, there must be (astronomically speaking) an accompanying lunar eclipse, either two weeks before or after the solar eclipse. All manner of solar and lunar eclipses are detailed at this link.
The lunar eclipse to accompanying the upcoming solar eclipse will occur, starting at night on March 25, 2024; but, it will be a penumbral lunar eclipse, which means the Full Moon will dim only slightly as the Moon passes through the outer shadow of Earth in space. This likely means that we may not see much dimming of the Full Moon's light during this lunar eclipse. Btw, in March that Full Moon's full phase will make it the Worm Moon.
On other items:
Don KA9QJG had asked the Net about a news article that stated the polar vortex was now blowing "in reverse". While this can happen, it is not unusual; that is, the Arctic Oscillation apparently occurs naturally, though scientists still haven't teased out the exact mechanism that causes it happen. But it a natural meteorological phenomenon.
What oscillates is the pattern and direction of Arctic winds, which can be strong and zonal (i.e., staying in northerly latitudes, primarily in an east-west direction), or, which can weaken and become meridional (i.e., meandering amid lower latitudes, often in a north-south direction), perhaps even reversing for a time. In the Northern Hemisphere, zonal flow keeps the polar vortex confined to the Arctic; meridional flow pushes cold air out of the polar regions and allows warm, southerly air to push northward.
Btw, the first day of Spring, the Vernal Equinox, began on March 19, 2024. That may seem early this year, and, while we may be used to hearing that Spring starts on March 21st, that is no longer the case for now; that is, Spring does NOT begin on March 21st at any time in the 21st century!
After the Net concluded, Don KA9QJG aired the audio track of a recent visual podcast from Dr. Tamitha Skov, the Space Weather Woman, who discussed recent solar activity and the prospect for solar flares.
Addendum: After the Astro Net, Don KA9QJG asked about the effect of the eclipse on animals. Good question.
Nature responds to this natural phenomenon, and perhaps in odd ways. As the natural world responds to the presence (or lack) of sunlight to guide their behavior, there are definite effects on domesticated animals and wildlife during a total solar eclipse. The last time a total eclipse swept the nation was in August 2017; many articles were written and posted about what might happen to animals. Here (below) are some samples.
At this link, this link and this link are overviews of animal behavior during a total solar eclipse: Horses will amble to the barn, cattle may start to low in the pasture, birds start to roost, chickens and roosters stop pecking, crickets start to chirp, bats may take flight while bees end their flight and wander aimlessly on the ground. And when the Moon's shadow passes, animals will pick up where they left off: Horses and cattle will head out to pasture, birds will sing, chickens will peck, roosters will crow, crickets will not chirp, bats will roost, and bees will take flight.
For pets, this link describes what Spot and Felix might experience. But dogs and cats will likely be fine; they don't need mylar eclipse glasses, since they don't stare at the Sun, unlike humans. At this link are superstitions, folklore, and odd tales of human behavior connected to solar eclipses. Finally, and at this link are other odd things humans have been known to do during an eclipse.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KA9QJG Don
KB9JVW Brad
W9ABN Ed
KC9CHS Mark
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks.
We expect to do an impromptu, last-minute Net, either called "Gaze-at-the-Eclipsed-Sun" or, perhaps more amusingly named "Your-Momma-Always-Told-You-Not-to-Look-at-the-Eclipsed-Sun" Astro Net on Wednesday, April 3, 2024, at 8:00 p. m.
Otherwise, tune in to the next regular Astro Net on Wednesday, April 10, 2024, at 8:00 p. m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
On planet activity:
Glenn KD9PNY informed listeners of current sky conditions and positions of the bright planets; specifically, where listeners can view Venus, Jupiter, and Saturn, at this link (weather permitting, of course).
On solar activity:
Though there are sunspots aplenty to observe, as Glenn KD9PNY reports, there are spots that appear to be active with flares. Recent activity posted at this link.
On the upcoming solar eclipse:
As in previous Nets, Roy KD9RSE and Glenn KD9PNY once again urged listeners and check-ins to take advantage of the chance to see a total solar eclipse on April 8, 2024. Various sites have convenient maps of the path of totality here. As mentioned in the previous several Net recaps, one can also become part of worldwide experiment in radio propagation, at this link, which the ARRL has sponsored during previous solar eclipses.
Though it's now just over two weeks away for the total solar eclipse, one may want still try to find a good location to view it, as motorists will jam the roadways that day (especially once the Moon's shadow has passed). Of course, exercise good common sense in your choice of a last-minute viewing spot, if you choose to risk the traffic jams or the prospect of meeting law enforcement.
As in previous Net installments, here's a repeat (below) of two safe ways to see that partial phases prior to and after the total solar eclipse: by looking for it on the ground, or, by looking at it through a welder's faceplate.
Here's one safe way (and good for the kids to try), using no fancy apparatus. During the partial phase that leads up to the total solar eclipse (or, during the ingress), the Moon only blocks a portion of the Sun; so, an uncommon "crescent Sun" is visible. Viewing the total solar eclipse can be done safely, but with non-optical techniques, such as with a pinhole projector box. Also, look for crescent suns on the ground, where sunlight filters through the leaves of trees or through objects that have small holes (like a kitchen colander). At this link is an example of what you might see.
Here's the other safe way, using a handheld glass filter. One can hold a #14 welder's glass (and only #14 glass, since other shades don't block out enough sunlight) up in front of one's face to view the partial phases of the eclipse (before and after totality). A faceplate may be available from a plumbing supply outlet (like Airgas; store locator at this link).
Hold the faceplate in front of your eyes to take a brief glimpse of the Sun during the partial phases of the eclipse leading up and trailing away from the actual total eclipse. Of course, through a welder's glass, the crescent Sun will appear green.
Solar eclipse glasses may be Ok to use to view the partial phases of the eclipse. But when the Moon blocks the Sun, then the mylar glasses are not needed; one can then and should look at the eclipsed Sun directly. It's a glorious sight to see!
Now only when the Moon continues on in its orbit (or, during the egress) and uncovers the Sun, one should then don again the mylar glasses to view the Sun. Btw, not all eclipse glasses are made the same, as some are made of darkened plastic or of thin mylar; not all eclipse glasses may be Sun-worthy.
On lunar activity:
Like we asserted at the last Astro Net, do note that if there's a solar eclipse, there must be (astronomically speaking) an accompanying lunar eclipse, either two weeks before or after the solar eclipse. All manner of solar and lunar eclipses are detailed at this link.
The lunar eclipse to accompanying the upcoming solar eclipse will occur, starting at night on March 25, 2024; but, it will be a penumbral lunar eclipse, which means the Full Moon will dim only slightly as the Moon passes through the outer shadow of Earth in space. This likely means that we may not see much dimming of the Full Moon's light during this lunar eclipse. Btw, in March that Full Moon's full phase will make it the Worm Moon.
On other items:
Don KA9QJG had asked the Net about a news article that stated the polar vortex was now blowing "in reverse". While this can happen, it is not unusual; that is, the Arctic Oscillation apparently occurs naturally, though scientists still haven't teased out the exact mechanism that causes it happen. But it a natural meteorological phenomenon.
What oscillates is the pattern and direction of Arctic winds, which can be strong and zonal (i.e., staying in northerly latitudes, primarily in an east-west direction), or, which can weaken and become meridional (i.e., meandering amid lower latitudes, often in a north-south direction), perhaps even reversing for a time. In the Northern Hemisphere, zonal flow keeps the polar vortex confined to the Arctic; meridional flow pushes cold air out of the polar regions and allows warm, southerly air to push northward.
Btw, the first day of Spring, the Vernal Equinox, began on March 19, 2024. That may seem early this year, and, while we may be used to hearing that Spring starts on March 21st, that is no longer the case for now; that is, Spring does NOT begin on March 21st at any time in the 21st century!
After the Net concluded, Don KA9QJG aired the audio track of a recent visual podcast from Dr. Tamitha Skov, the Space Weather Woman, who discussed recent solar activity and the prospect for solar flares.
Addendum: After the Astro Net, Don KA9QJG asked about the effect of the eclipse on animals. Good question.
Nature responds to this natural phenomenon, and perhaps in odd ways. As the natural world responds to the presence (or lack) of sunlight to guide their behavior, there are definite effects on domesticated animals and wildlife during a total solar eclipse. The last time a total eclipse swept the nation was in August 2017; many articles were written and posted about what might happen to animals. Here (below) are some samples.
At this link, this link and this link are overviews of animal behavior during a total solar eclipse: Horses will amble to the barn, cattle may start to low in the pasture, birds start to roost, chickens and roosters stop pecking, crickets start to chirp, bats may take flight while bees end their flight and wander aimlessly on the ground. And when the Moon's shadow passes, animals will pick up where they left off: Horses and cattle will head out to pasture, birds will sing, chickens will peck, roosters will crow, crickets will not chirp, bats will roost, and bees will take flight.
For pets, this link describes what Spot and Felix might experience. But dogs and cats will likely be fine; they don't need mylar eclipse glasses, since they don't stare at the Sun, unlike humans. At this link are superstitions, folklore, and odd tales of human behavior connected to solar eclipses. Finally, and at this link are other odd things humans have been known to do during an eclipse.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KA9QJG Don
KB9JVW Brad
W9ABN Ed
KC9CHS Mark
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks.
We expect to do an impromptu, last-minute Net, either called "Gaze-at-the-Eclipsed-Sun" or, perhaps more amusingly named "Your-Momma-Always-Told-You-Not-to-Look-at-the-Eclipsed-Sun" Astro Net on Wednesday, April 3, 2024, at 8:00 p. m.
Otherwise, tune in to the next regular Astro Net on Wednesday, April 10, 2024, at 8:00 p. m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
Astro Net recap, for March 6, 2024
Highlights from on-the-air ham radio transmission on 147.045 MHz
For the 46th installment of the Astro Net on 3/6/2024, Roy KD9RSE started the Net with cross-banding from his usual observing site, named the OAAO (which is his Open-Air Asphalt Observatory, better known as the driveway), then moved back to the shack to continue the Net. In the interim, Glenn KD9PNY informed listeners of current sky conditions and positions of the bright planets.
On solar activity:
Though there are sunspots aplenty to observe, as Glenn KD9PNY reports, few spots appear to active with flares; so, radio propagation appears nominal (given current solar indices). Recent activity posted at this link.
On the upcoming solar eclipse:
As in previous Nets, Roy KD9RSE and Glenn KD9PNY once again urged listeners and check-ins to take advantage of the chance to see a total solar eclipse on April 8, 2024. Various sites have convenient maps of the path of totality here. As mentioned in the previous several Net recaps, one can also become part of worldwide experiment in radio propagation, at this link, which the ARRL has sponsored during previous solar eclipses.
Though it's now only about one month away for the total solar eclipse, one may want still try to find a good location to view it, as motorists will jam the roadways that day (especially once the Moon's shadow has passed).
As in previous Net installments, here's a repeat (below) of two safe ways to see that partial phases prior to and after the total solar eclipse: by looking for it on the ground, or, by looking at it through a welder's faceplate.
Here's one safe way (and good for the kids to try), using no fancy apparatus. During the partial phase that leads up to the total solar eclipse (or, during the ingress), the Moon only blocks a portion of the Sun; so, an uncommon "crescent Sun" is visible. Viewing the total solar eclipse can be done safely, but with non-optical techniques, such as with a pinhole projector box. Also, look for crescent suns on the ground, where sunlight filters through the leaves of trees or through objects that have small holes (like a kitchen colander). At this link is an example of what you might see.
Here's the other safe way, using a handheld glass filter. One can hold a #14 welder's glass (and only #14 glass, since other shades don't block out enough sunlight) up in front of one's face to view the partial phases of the eclipse (before and after totality). A faceplate may be available from a plumbing supply outlet (like Airgas; store locator at this link).
Hold the faceplate in front of your eyes to take a brief glimpse of the Sun during the partial phases of the eclipse leading up and trailing away from the actual total eclipse. Of course, through a welder's glass, the crescent Sun will appear green.
Solar eclipse glasses may be Ok to use to view the partial phases of the eclipse. But when the Moon blocks the Sun, then the mylar glasses are not needed; one can then and should look at the eclipsed Sun directly. It's a glorious sight to see!
Now only when the Moon continues on in its orbit (or, during the egress) and uncovers the Sun, one should then don again the mylar glasses to view the Sun. Btw, not all eclipse glasses are made the same, as some are made of darkened plastic or of thin mylar; not all eclipse glasses may be Sun-worthy.
On lunar activity:
Note that if there's a solar eclipse, there must an accompanying lunar eclipse, either two weeks before or after the solar eclipse. All manner of solar and lunar eclipses are detailed at this link. The lunar eclipse to accompanying the upcoming solar eclipse will occur, starting at night on March 25, 2024; but, it will be a penumbral lunar eclipse, which means the Full Moon will dim only slightly as the Moon passes through the outer shadow of Earth in space. This likely means that we may not see much dimming of the Full Moon's light during this lunar eclipse. Btw, in March that Full Moon's full phase will make it the Worm Moon, named for the fish bait that may wriggle out of the ground as Spring approaches.
On planet activity:
Glenn KD9PNY outlined where listeners can view Jupiter and Saturn, at this link (weather permitting, of course).
On other items:
Roy KD9RSE reminded check-ins and listeners that the first day of Spring, the Vernal Equinox, will begin on March 19, 2024. That may seem early this year; but, since this is a Leap Year (due to the modern Gregorian calendar) with its Leap Day on 2/29, the date of the equinox would shift forward. Perhaps more insightful is that, since Earth does not revolve around the Sun in exactly 365 days, every fourth Earth orbit (or, every four years) there must be inserted that extra day.
Btw, while we may be used to hearing that Spring starts on March 21st, that is no longer the case for now; that is, Spring does NOT begin on March 21st at any time in the 21st century!
With the change of season to Spring coming up, Glenn KD9PNY noted that robins (often a folklore sign of the approaching season of Spring) apparently never left the area this past Winter. The American Robin is known to migrate to warmer areas during Midwestern winters, but not always (see this link). Apparently, the species (and its sub-species) can readily adapt to seasonal conditions; but, its own migratory urge will be dictated by local weather and availability of food, or, that urge may not even kick in every year.
Greg KD9HOK also checked in with his own notes for the approach of Spring; for his gardening needs, he evidently stocked up on bags of worm castings (yes, you read that right) and got a bucket of earthworm eggs. (You can get yours, too. In Illinois, go to this link; in Indiana, go to this link.) Btw, one can even make "earthworm casting tea"; here's how to do it.
Here at the Astro Net, we endeavor to cover not only what one can see across the sky, like the Sun, Moon, stars, and planets; but, even the birds that fly in the air above the Earth to the crawling animals on and under the ground.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KB9JVW Brad
K9SGA Dan
KA9QJG Don
W9ABN Ed
KD9HOK Greg
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next Astro Net on Wednesday, March 20, 2024, at 8:00 p.m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
On solar activity:
Though there are sunspots aplenty to observe, as Glenn KD9PNY reports, few spots appear to active with flares; so, radio propagation appears nominal (given current solar indices). Recent activity posted at this link.
On the upcoming solar eclipse:
As in previous Nets, Roy KD9RSE and Glenn KD9PNY once again urged listeners and check-ins to take advantage of the chance to see a total solar eclipse on April 8, 2024. Various sites have convenient maps of the path of totality here. As mentioned in the previous several Net recaps, one can also become part of worldwide experiment in radio propagation, at this link, which the ARRL has sponsored during previous solar eclipses.
Though it's now only about one month away for the total solar eclipse, one may want still try to find a good location to view it, as motorists will jam the roadways that day (especially once the Moon's shadow has passed).
As in previous Net installments, here's a repeat (below) of two safe ways to see that partial phases prior to and after the total solar eclipse: by looking for it on the ground, or, by looking at it through a welder's faceplate.
Here's one safe way (and good for the kids to try), using no fancy apparatus. During the partial phase that leads up to the total solar eclipse (or, during the ingress), the Moon only blocks a portion of the Sun; so, an uncommon "crescent Sun" is visible. Viewing the total solar eclipse can be done safely, but with non-optical techniques, such as with a pinhole projector box. Also, look for crescent suns on the ground, where sunlight filters through the leaves of trees or through objects that have small holes (like a kitchen colander). At this link is an example of what you might see.
Here's the other safe way, using a handheld glass filter. One can hold a #14 welder's glass (and only #14 glass, since other shades don't block out enough sunlight) up in front of one's face to view the partial phases of the eclipse (before and after totality). A faceplate may be available from a plumbing supply outlet (like Airgas; store locator at this link).
Hold the faceplate in front of your eyes to take a brief glimpse of the Sun during the partial phases of the eclipse leading up and trailing away from the actual total eclipse. Of course, through a welder's glass, the crescent Sun will appear green.
Solar eclipse glasses may be Ok to use to view the partial phases of the eclipse. But when the Moon blocks the Sun, then the mylar glasses are not needed; one can then and should look at the eclipsed Sun directly. It's a glorious sight to see!
Now only when the Moon continues on in its orbit (or, during the egress) and uncovers the Sun, one should then don again the mylar glasses to view the Sun. Btw, not all eclipse glasses are made the same, as some are made of darkened plastic or of thin mylar; not all eclipse glasses may be Sun-worthy.
On lunar activity:
Note that if there's a solar eclipse, there must an accompanying lunar eclipse, either two weeks before or after the solar eclipse. All manner of solar and lunar eclipses are detailed at this link. The lunar eclipse to accompanying the upcoming solar eclipse will occur, starting at night on March 25, 2024; but, it will be a penumbral lunar eclipse, which means the Full Moon will dim only slightly as the Moon passes through the outer shadow of Earth in space. This likely means that we may not see much dimming of the Full Moon's light during this lunar eclipse. Btw, in March that Full Moon's full phase will make it the Worm Moon, named for the fish bait that may wriggle out of the ground as Spring approaches.
On planet activity:
Glenn KD9PNY outlined where listeners can view Jupiter and Saturn, at this link (weather permitting, of course).
On other items:
Roy KD9RSE reminded check-ins and listeners that the first day of Spring, the Vernal Equinox, will begin on March 19, 2024. That may seem early this year; but, since this is a Leap Year (due to the modern Gregorian calendar) with its Leap Day on 2/29, the date of the equinox would shift forward. Perhaps more insightful is that, since Earth does not revolve around the Sun in exactly 365 days, every fourth Earth orbit (or, every four years) there must be inserted that extra day.
Btw, while we may be used to hearing that Spring starts on March 21st, that is no longer the case for now; that is, Spring does NOT begin on March 21st at any time in the 21st century!
With the change of season to Spring coming up, Glenn KD9PNY noted that robins (often a folklore sign of the approaching season of Spring) apparently never left the area this past Winter. The American Robin is known to migrate to warmer areas during Midwestern winters, but not always (see this link). Apparently, the species (and its sub-species) can readily adapt to seasonal conditions; but, its own migratory urge will be dictated by local weather and availability of food, or, that urge may not even kick in every year.
Greg KD9HOK also checked in with his own notes for the approach of Spring; for his gardening needs, he evidently stocked up on bags of worm castings (yes, you read that right) and got a bucket of earthworm eggs. (You can get yours, too. In Illinois, go to this link; in Indiana, go to this link.) Btw, one can even make "earthworm casting tea"; here's how to do it.
Here at the Astro Net, we endeavor to cover not only what one can see across the sky, like the Sun, Moon, stars, and planets; but, even the birds that fly in the air above the Earth to the crawling animals on and under the ground.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KB9JVW Brad
K9SGA Dan
KA9QJG Don
W9ABN Ed
KD9HOK Greg
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next Astro Net on Wednesday, March 20, 2024, at 8:00 p.m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
Astro Net recap, for February 21, 2024
Highlights from on-the-air ham radio transmission on 147.045 MHz
For the 45th installment of the Astro Net on 2/21/2024, Roy KD9RSE had a rough start getting the Net going, with garbled static instead of a sound opening. Glenn KD9PNY took the controls and got the Astro Net into a brief orbit. That orbit decayed after a time, when communications for a few check-ins did not improve overall; so, the Net came in for an early landing. Thanks to those wanting to listen to some static and a few observations about what to see in the sky.
On solar activity:
Perhaps recent flares may be roiling the bands intermittently, or, the recent filament lift-off from the Sun may have a rapid leading edge that's starting to play some havoc with the higher HF bands. Not certain at this point, but we'll see what develops in the next few hours or day; at this link are more videos of recent solar activity and the filament lift-off. The usual solar indices reveal a fairly high solar flux but relatively low indices, as of this writing. Whatever the case, the calls from check-ins were fairly filled with static; Allan KA9EFD noted the 20-meter band was poor in propagation all day this date, while Brandon K9PZ reported clear propagation on other bands (like the 15-meter band).
On the upcoming solar eclipse:
Roy KD9RSE once again urged listeners and check-ins to take advantage of the chance to see a total solar eclipse on April 8, 2024. Various sites have convenient maps of the path of totality here. As mentioned in the previous several Net recaps, one can also become part of worldwide experiment in radio propagation, at this link, which the ARRL has sponsored during previous solar eclipses. Though it's now only about six weeks away for the total solar eclipse, one may want still try to find a good location to view it, as motorists will jam the roadways that day (especially once the Moon's shadow has passed).
As in previous Net installments, here's a repeat of two safe ways to see that partial phases prior to and after the total solar eclipse: by looking for it on the ground, or, by looking at it through a welder's faceplate.
Here's one safe way (and good for the kids to try), using no fancy apparatus. During the partial phase that leads up to the total solar eclipse (or, during the ingress), the Moon only blocks a portion of the Sun; so, an uncommon "crescent Sun" is visible. Viewing the total solar eclipse can be done safely, but with non-optical techniques, such as with a pinhole projector box. Also, look for crescent suns on the ground, where sunlight filters through the leaves of trees or through objects that have small holes (like a kitchen colander). At this link is an example of what you might see.
Here's the other safe way, using a handheld glass filter. One can hold a #14 welder's glass (and only #14 glass, since other shades don't block out enough sunlight) up in front of one's face to view the partial phases of the eclipse (before and after totality). A faceplate may be available from a plumbing supply outlet (like Airgas; store locator at this link).
Hold the faceplate in front of your eyes to take a brief glimpse of the Sun during the partial phases of the eclipse leading up and trailing away from the actual total eclipse. Of course, through a welder's glass, the crescent Sun will appear green.
Solar eclipse glasses may be Ok to use to view the partial phases of the eclipse. But when the Moon blocks the Sun, then the mylar glasses are not needed; one can then and should look at the eclipsed Sun directly. It's a glorious sight to see!
Now only when the Moon continues on in its orbit (or, during the egress) and uncovers the Sun, one should then don again the mylar glasses to view the Sun. Btw, not all eclipse glasses are made the same, as some are made of darkened plastic or of thin mylar; not all eclipse glasses may be Sun-worthy.
On lunar activity:
Note that if there's a solar eclipse, there must an accompanying lunar eclipse, either two weeks before or after the solar eclipse. All manner of solar and lunar eclipses are detailed at this link. The lunar eclipse to accompanying the upcoming solar eclipse will occur, starting at night on March 25, 2024; but, it will be a penumbral lunar eclipse, which means the Full Moon will dim only slightly as the Moon passes through the outer shadow of Earth in space. This likely means that we may not see much dimming of the Full Moon's light during this lunar eclipse. Btw, in March that Full Moon's full phase will make it the Worm Moon, named for the fish bait that may wriggle out of the ground as Spring approaches.
On planet activity:
Glenn KD9PNY outlined where listeners can view Jupiter and Saturn, at this link (weather permitting, of course).
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KA9EFD Allan
KD9IQU Nick
K9PZ Brandon
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next Astro Net on Wednesday, March 6, 2024, at 8:00 p.m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
On solar activity:
Perhaps recent flares may be roiling the bands intermittently, or, the recent filament lift-off from the Sun may have a rapid leading edge that's starting to play some havoc with the higher HF bands. Not certain at this point, but we'll see what develops in the next few hours or day; at this link are more videos of recent solar activity and the filament lift-off. The usual solar indices reveal a fairly high solar flux but relatively low indices, as of this writing. Whatever the case, the calls from check-ins were fairly filled with static; Allan KA9EFD noted the 20-meter band was poor in propagation all day this date, while Brandon K9PZ reported clear propagation on other bands (like the 15-meter band).
On the upcoming solar eclipse:
Roy KD9RSE once again urged listeners and check-ins to take advantage of the chance to see a total solar eclipse on April 8, 2024. Various sites have convenient maps of the path of totality here. As mentioned in the previous several Net recaps, one can also become part of worldwide experiment in radio propagation, at this link, which the ARRL has sponsored during previous solar eclipses. Though it's now only about six weeks away for the total solar eclipse, one may want still try to find a good location to view it, as motorists will jam the roadways that day (especially once the Moon's shadow has passed).
As in previous Net installments, here's a repeat of two safe ways to see that partial phases prior to and after the total solar eclipse: by looking for it on the ground, or, by looking at it through a welder's faceplate.
Here's one safe way (and good for the kids to try), using no fancy apparatus. During the partial phase that leads up to the total solar eclipse (or, during the ingress), the Moon only blocks a portion of the Sun; so, an uncommon "crescent Sun" is visible. Viewing the total solar eclipse can be done safely, but with non-optical techniques, such as with a pinhole projector box. Also, look for crescent suns on the ground, where sunlight filters through the leaves of trees or through objects that have small holes (like a kitchen colander). At this link is an example of what you might see.
Here's the other safe way, using a handheld glass filter. One can hold a #14 welder's glass (and only #14 glass, since other shades don't block out enough sunlight) up in front of one's face to view the partial phases of the eclipse (before and after totality). A faceplate may be available from a plumbing supply outlet (like Airgas; store locator at this link).
Hold the faceplate in front of your eyes to take a brief glimpse of the Sun during the partial phases of the eclipse leading up and trailing away from the actual total eclipse. Of course, through a welder's glass, the crescent Sun will appear green.
Solar eclipse glasses may be Ok to use to view the partial phases of the eclipse. But when the Moon blocks the Sun, then the mylar glasses are not needed; one can then and should look at the eclipsed Sun directly. It's a glorious sight to see!
Now only when the Moon continues on in its orbit (or, during the egress) and uncovers the Sun, one should then don again the mylar glasses to view the Sun. Btw, not all eclipse glasses are made the same, as some are made of darkened plastic or of thin mylar; not all eclipse glasses may be Sun-worthy.
On lunar activity:
Note that if there's a solar eclipse, there must an accompanying lunar eclipse, either two weeks before or after the solar eclipse. All manner of solar and lunar eclipses are detailed at this link. The lunar eclipse to accompanying the upcoming solar eclipse will occur, starting at night on March 25, 2024; but, it will be a penumbral lunar eclipse, which means the Full Moon will dim only slightly as the Moon passes through the outer shadow of Earth in space. This likely means that we may not see much dimming of the Full Moon's light during this lunar eclipse. Btw, in March that Full Moon's full phase will make it the Worm Moon, named for the fish bait that may wriggle out of the ground as Spring approaches.
On planet activity:
Glenn KD9PNY outlined where listeners can view Jupiter and Saturn, at this link (weather permitting, of course).
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KA9EFD Allan
KD9IQU Nick
K9PZ Brandon
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next Astro Net on Wednesday, March 6, 2024, at 8:00 p.m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
Astro Net recap, for February 7, 2024
Highlights from on-the-air ham radio transmission on 147.045 MHz
For the 44th installment of the Astro Net on 2/7/2024, Roy KD9RSE piloted the Astro Net for a time tonight, with Glenn KD9PNY first hanging onto the tailfin, then quickly climbing into the cockpit of the Astro Net shuttle, as it settled into orbit. We're all grateful to those wanting to listen and to participate.
On solar activity:
For this part of Cycle 25, there were recent flares, which evidently played some havoc with the higher HF bands. The usual solar indices reveal a high solar flux but low indices, as of this writing. Roy KD9RSE indicated that the relative strength of radio propagation on the HF bands may come and go quickly; such it is with the effects of an active Sun on Earth's atmosphere.
On the upcoming solar eclipse:
Roy KD9RSE once again urged listeners and check-ins to take advantage of the chance to see a total solar eclipse on April 8, 2024. Various sites have convenient maps of the path of totality here. One can also become part of worldwide experiment in radio propagation, at this link, which the ARRL has sponsored during previous solar eclipses. Though it's now only two months away for the solar eclipse, one may want to find a good location to view it, as motorists will jam the roadways that day.
As in previous Net installments, here's a repeat of two safe ways to see that partial phases prior to and after the total solar eclipse: by looking for it on the ground, or, by looking at it through a welder's faceplate.
That is, during a partial phase that leads up to the total solar eclipse (or, during the ingress), the Moon only blocks a portion of the Sun; so, an uncommon "crescent Sun" is visible. Viewing the total solar eclipse can be done safely, but with non-optical techniques, such as with a pinhole projector box. Also, look for crescent suns on the ground, where sunlight filters through the leaves of trees or through objects that have small holes (like a kitchen colander). At this link is an example of what you might see.
One can also use a #14 welder's glass (and only #14 glass, since other shades don't block out enough sunlight) to view the partial eclipse we can see here. A faceplate may be available from a plumbing supply outlet (like Airgas; store locator at this link). Hold the faceplate in front of your eyes to take a brief glimpse of the Sun during the partial phases of the eclipse leading up and trailing away from the actual total eclipse. Of course, through a welder's glass, the crescent Sun will appear green.
Solar eclipse glasses may be Ok to use to view the partial phases of the eclipse. But when the Moon blocks the Sun, then the mylar glasses are not needed; one can then and should look at the eclipsed Sun directly. It's a glorious sight to see!
Now only when the Moon continues on in its orbit (or, during the egress) and uncovers the Sun, one should then don again the mylar glasses to view the Sun. Btw, not all eclipse glasses are made the same, as some are made of darkened plastic or of thin mylar; not all eclipse glasses may be Sun-worthy.
On lunar activity:
While the February Moon's full phase is known as the Snow Moon, this month's New Moon phase (which isn't usually seen in that phase, except during a total polar eclipse) occurs at the Moon's perigee; that is, when it's closest to Earth in its monthly orbit around Earth. When the Moon's perigee coincides with its New Moon phase, then that can result in proxigean spring tides, which are high tides slightly higher than may be expected.
On planet activity:
Glenn KD9PNY outlined where listeners can view Jupiter and Saturn, at this link (weather permitting, of course).
On other items:
In response to questions from Don KA9QJG on band conditions and solar activity, both Glenn KD9PNY and Roy KD9RSE commented on effects that flares and solar eruptions can cause. For example, Glenn KD9PNY referenced the Carrington Event, which was (at its time in 1859) a significant solar storm, aimed at Earth, with auroral displays and geomagnetic storms.
Even though a huge solar storm could interrupt and distort radio propagation, Roy KD9RSE observed that, over the last several decades, solar cycles (e.g., average sunspot numbers per cycle) have decreased; that is, cycles have decreased in intensity. Roy KD9RSE maintains that Cycle 25 (once it's past its peak and determined at an end) will be no greater in intensity than the previous cycle, and, the decreasing trend will persist.
We'll see what happens in the future and at the next Astro Net.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9YZM Rich
K9PZ Brandon
N9TES Rick
KA9QJG Don
KD9PNY Glenn
N9IK Nick
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next Astro Net on Wednesday, February 21, 2024, at 8:00 p.m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
On solar activity:
For this part of Cycle 25, there were recent flares, which evidently played some havoc with the higher HF bands. The usual solar indices reveal a high solar flux but low indices, as of this writing. Roy KD9RSE indicated that the relative strength of radio propagation on the HF bands may come and go quickly; such it is with the effects of an active Sun on Earth's atmosphere.
On the upcoming solar eclipse:
Roy KD9RSE once again urged listeners and check-ins to take advantage of the chance to see a total solar eclipse on April 8, 2024. Various sites have convenient maps of the path of totality here. One can also become part of worldwide experiment in radio propagation, at this link, which the ARRL has sponsored during previous solar eclipses. Though it's now only two months away for the solar eclipse, one may want to find a good location to view it, as motorists will jam the roadways that day.
As in previous Net installments, here's a repeat of two safe ways to see that partial phases prior to and after the total solar eclipse: by looking for it on the ground, or, by looking at it through a welder's faceplate.
That is, during a partial phase that leads up to the total solar eclipse (or, during the ingress), the Moon only blocks a portion of the Sun; so, an uncommon "crescent Sun" is visible. Viewing the total solar eclipse can be done safely, but with non-optical techniques, such as with a pinhole projector box. Also, look for crescent suns on the ground, where sunlight filters through the leaves of trees or through objects that have small holes (like a kitchen colander). At this link is an example of what you might see.
One can also use a #14 welder's glass (and only #14 glass, since other shades don't block out enough sunlight) to view the partial eclipse we can see here. A faceplate may be available from a plumbing supply outlet (like Airgas; store locator at this link). Hold the faceplate in front of your eyes to take a brief glimpse of the Sun during the partial phases of the eclipse leading up and trailing away from the actual total eclipse. Of course, through a welder's glass, the crescent Sun will appear green.
Solar eclipse glasses may be Ok to use to view the partial phases of the eclipse. But when the Moon blocks the Sun, then the mylar glasses are not needed; one can then and should look at the eclipsed Sun directly. It's a glorious sight to see!
Now only when the Moon continues on in its orbit (or, during the egress) and uncovers the Sun, one should then don again the mylar glasses to view the Sun. Btw, not all eclipse glasses are made the same, as some are made of darkened plastic or of thin mylar; not all eclipse glasses may be Sun-worthy.
On lunar activity:
While the February Moon's full phase is known as the Snow Moon, this month's New Moon phase (which isn't usually seen in that phase, except during a total polar eclipse) occurs at the Moon's perigee; that is, when it's closest to Earth in its monthly orbit around Earth. When the Moon's perigee coincides with its New Moon phase, then that can result in proxigean spring tides, which are high tides slightly higher than may be expected.
On planet activity:
Glenn KD9PNY outlined where listeners can view Jupiter and Saturn, at this link (weather permitting, of course).
On other items:
In response to questions from Don KA9QJG on band conditions and solar activity, both Glenn KD9PNY and Roy KD9RSE commented on effects that flares and solar eruptions can cause. For example, Glenn KD9PNY referenced the Carrington Event, which was (at its time in 1859) a significant solar storm, aimed at Earth, with auroral displays and geomagnetic storms.
Even though a huge solar storm could interrupt and distort radio propagation, Roy KD9RSE observed that, over the last several decades, solar cycles (e.g., average sunspot numbers per cycle) have decreased; that is, cycles have decreased in intensity. Roy KD9RSE maintains that Cycle 25 (once it's past its peak and determined at an end) will be no greater in intensity than the previous cycle, and, the decreasing trend will persist.
We'll see what happens in the future and at the next Astro Net.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9YZM Rich
K9PZ Brandon
N9TES Rick
KA9QJG Don
KD9PNY Glenn
N9IK Nick
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next Astro Net on Wednesday, February 21, 2024, at 8:00 p.m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
Astro Net recap, for January 24, 2024
Highlights from on-the-air ham radio transmission on 147.045 MHz
For the 43rd installment of the Astro Net on 1/24/2024, Roy KD9RSE and Glenn KD9PNY piloted the Astro Net into orbit for a time tonight, grateful to those wanting to listen and to participate.
On solar activity:
As in previous installments, solar activity in this Cycle 25 appears prominently in the news. The usual solar indices reveal several recent storms, though none directed recently at Earth (as of this writing). As in the previous Astro Net installment, Roy KD9RSE indicated that the relative strength of radio propagation on the HF bands may come and go in mere minutes; such it is with the effects of an active Sun on Earth's atmosphere.
On the upcoming solar eclipse:
As in previous Nets, Roy KD9RSE once again urged listeners and check-ins to take advantage of the chance to see a total solar eclipse on April 8, 2024. Various sites have convenient maps of the path of totality here. Another good site is here (as suggested by Randy KD9VBE). One can also become part of worldwide experiment in radio propagation, at this link, which the ARRL has sponsored during previous solar eclipses. Though it's now less than three months away for the solar eclipse, one may want to find a good location to view it, as motorists will jam the roadways that day.
Here are two safe ways to see that partial eclipse: by looking for it on the ground, or, by looking at it through a welder's faceplate.
That is, during a partial solar eclipse, the Moon only blocks a portion of the Sun; so, an uncommon "crescent Sun" is visible. Viewing the total solar eclipse can be done safely, but with non-optical techniques, such as with a pinhole projector box. Also, look for crescent suns on the ground, where sunlight filters through the leaves of trees or through objects that have small holes (like a kitchen colander). At this link is an example of what you might see.
One can also use a #14 welder's glass (and only #14 glass, since other shades don't block out enough sunlight) to view the partial eclipse we can see here. A faceplate may be available from a plumbing supply outlet (like Airgas; store locator at this link). Hold the faceplate in front of your eyes to take a brief glimpse of the Sun during the partial phases of the eclipse leading up and trailing away from the actual total eclipse. Of course, through a welder's glass, the crescent Sun will appear green.
Solar eclipse glasses may be Ok to use to view the eclipse. Not all eclipse glasses are made the same, as some are made of darkened plastic or of thin mylar; not all eclipse glasses may be Sun-worthy. Buyer beware!
On lunar activity:
With the January Moon's full phase known as the Wolf Moon, it can be a treat to see its effects in the atmosphere. For example, the appearance of a moon halo, due to high cirrus clouds, often can (though not always) foretell the arrival of precipitation.
Also, the appearance of the Full Moon, particularly its "face" as seen from Earth, is noteworthy, since the mottling on the Moon's ancient surface, when viewed without any optical aid, can take on the appearance of a face. A brief explanation and a summary of various legends about the Man-in-the Moon are at this link. (Now have you ever seen the Lady-in-the-Moon?)
But that lunar face (whether a man or a woman) is always facing us on Earth since, as the Moon revolves around Earth, the Moon also spins very slowly. More to the point, its period of rotation matches its period of revolution; that is, the Moon spins only as fast as it orbits, taking one month to spin and to go around Earth. As a result, only one side of the Moon is visible to us observers on Earth.
On planet activity:
Glenn KD9PNY outlined where listeners can view Jupiter and Saturn, at this link (weather permitting, of course). Other planetary pairings are also outlined at that same link.
On meteor activity:
While one needs no special equipment to view meteors and meteor showers by eye, mainly sporadic meteors may be visible after midnight on a clear night or perhaps even some remnants of the Quadrantid shower, which peaked earlier this month of January.
On telescope selection:
To view the night sky, optical aid is necessary. Roy KD9RSE suggested selecting the right aid to view the night skies; for example, at this link. What one may like to look at in the sky likely would influence what one might like to observe and some of the jargon that describes scopes' operation; but, one does not need to spend huge sums of money to view the night sky.
Btw, there are simple scopes that kids can build or serious projects for older folks. Major telescope manufacturers include Celestron and Meade; a major distributor is Orion.
On other items:
Randy KD9VBE repeated his on-the-air recommendation to download and use the night-sky software known as Stellarium (download it for free at this link for your specific operating system). This program makes viewing the night sky comprehensible and quick to learn. He also advocated for the use of the Ham Clock, at this link.
Rich KD9YZM noted he once used phone apps to view the night sky; they still are available, at this link, this link, and this link.
Randy KD9VBE reminded listeners that this 2024 is indeed a leap year (so, an extra day is tacked on the end of February). As to the reason for a calendar's leap year, Roy KD9RSE briefly described the historical path of the leap year, first as a necessity in the Julian calendar and later as a refinement in the Gregorian calendar. That is, under the Julian calendar leap years were those year-numerals evenly divided by four, whereas the Gregorian calendar refined the leap-year definition so that years ending in double-zeroes also needed to be divisible evenly by 400 to be considered a leap year.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KB9JVW Brad
W9ABN Ed
KD9WFF Randall
KD9YZM Rich
KD9VBE Randy
KA9QJG Don
K9PZ Brandon
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next Astro Net on Wednesday, February 7, 2024, at 8:00 p.m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
On solar activity:
As in previous installments, solar activity in this Cycle 25 appears prominently in the news. The usual solar indices reveal several recent storms, though none directed recently at Earth (as of this writing). As in the previous Astro Net installment, Roy KD9RSE indicated that the relative strength of radio propagation on the HF bands may come and go in mere minutes; such it is with the effects of an active Sun on Earth's atmosphere.
On the upcoming solar eclipse:
As in previous Nets, Roy KD9RSE once again urged listeners and check-ins to take advantage of the chance to see a total solar eclipse on April 8, 2024. Various sites have convenient maps of the path of totality here. Another good site is here (as suggested by Randy KD9VBE). One can also become part of worldwide experiment in radio propagation, at this link, which the ARRL has sponsored during previous solar eclipses. Though it's now less than three months away for the solar eclipse, one may want to find a good location to view it, as motorists will jam the roadways that day.
Here are two safe ways to see that partial eclipse: by looking for it on the ground, or, by looking at it through a welder's faceplate.
That is, during a partial solar eclipse, the Moon only blocks a portion of the Sun; so, an uncommon "crescent Sun" is visible. Viewing the total solar eclipse can be done safely, but with non-optical techniques, such as with a pinhole projector box. Also, look for crescent suns on the ground, where sunlight filters through the leaves of trees or through objects that have small holes (like a kitchen colander). At this link is an example of what you might see.
One can also use a #14 welder's glass (and only #14 glass, since other shades don't block out enough sunlight) to view the partial eclipse we can see here. A faceplate may be available from a plumbing supply outlet (like Airgas; store locator at this link). Hold the faceplate in front of your eyes to take a brief glimpse of the Sun during the partial phases of the eclipse leading up and trailing away from the actual total eclipse. Of course, through a welder's glass, the crescent Sun will appear green.
Solar eclipse glasses may be Ok to use to view the eclipse. Not all eclipse glasses are made the same, as some are made of darkened plastic or of thin mylar; not all eclipse glasses may be Sun-worthy. Buyer beware!
On lunar activity:
With the January Moon's full phase known as the Wolf Moon, it can be a treat to see its effects in the atmosphere. For example, the appearance of a moon halo, due to high cirrus clouds, often can (though not always) foretell the arrival of precipitation.
Also, the appearance of the Full Moon, particularly its "face" as seen from Earth, is noteworthy, since the mottling on the Moon's ancient surface, when viewed without any optical aid, can take on the appearance of a face. A brief explanation and a summary of various legends about the Man-in-the Moon are at this link. (Now have you ever seen the Lady-in-the-Moon?)
But that lunar face (whether a man or a woman) is always facing us on Earth since, as the Moon revolves around Earth, the Moon also spins very slowly. More to the point, its period of rotation matches its period of revolution; that is, the Moon spins only as fast as it orbits, taking one month to spin and to go around Earth. As a result, only one side of the Moon is visible to us observers on Earth.
On planet activity:
Glenn KD9PNY outlined where listeners can view Jupiter and Saturn, at this link (weather permitting, of course). Other planetary pairings are also outlined at that same link.
On meteor activity:
While one needs no special equipment to view meteors and meteor showers by eye, mainly sporadic meteors may be visible after midnight on a clear night or perhaps even some remnants of the Quadrantid shower, which peaked earlier this month of January.
On telescope selection:
To view the night sky, optical aid is necessary. Roy KD9RSE suggested selecting the right aid to view the night skies; for example, at this link. What one may like to look at in the sky likely would influence what one might like to observe and some of the jargon that describes scopes' operation; but, one does not need to spend huge sums of money to view the night sky.
Btw, there are simple scopes that kids can build or serious projects for older folks. Major telescope manufacturers include Celestron and Meade; a major distributor is Orion.
On other items:
Randy KD9VBE repeated his on-the-air recommendation to download and use the night-sky software known as Stellarium (download it for free at this link for your specific operating system). This program makes viewing the night sky comprehensible and quick to learn. He also advocated for the use of the Ham Clock, at this link.
Rich KD9YZM noted he once used phone apps to view the night sky; they still are available, at this link, this link, and this link.
Randy KD9VBE reminded listeners that this 2024 is indeed a leap year (so, an extra day is tacked on the end of February). As to the reason for a calendar's leap year, Roy KD9RSE briefly described the historical path of the leap year, first as a necessity in the Julian calendar and later as a refinement in the Gregorian calendar. That is, under the Julian calendar leap years were those year-numerals evenly divided by four, whereas the Gregorian calendar refined the leap-year definition so that years ending in double-zeroes also needed to be divisible evenly by 400 to be considered a leap year.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KB9JVW Brad
W9ABN Ed
KD9WFF Randall
KD9YZM Rich
KD9VBE Randy
KA9QJG Don
K9PZ Brandon
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next Astro Net on Wednesday, February 7, 2024, at 8:00 p.m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
Astro Net recap, for January 10, 2024
Highlights from on-the-air ham radio transmission on 147.045 MHz
For the 42nd installment of the Astro Net on 1/10/2024, Roy KD9RSE piloted the Astro Net solo into orbit for a short time, while Glenn KD9PNY was away from the Net in another part of the galaxy.
On solar activity:
As in previous installments, solar activity takes center stage as current solar indices show a minor solar storm toying with the popular ham bands in recent hours. Roy KD9RSE indicated that one can still make contacts across the HF bands, but the relative strength of radio propagation may come and go in mere minutes. So it goes with the unyielding effect of an active Sun on Earth's atmosphere.
Various solar indices can help to make sense of variable propagation, and, at this link is a handy web page, posted in recent Astro Net recaps, that has additional information and links on interpreting the effect of solar indices on HF bands. At this link and at this link are solar-storm prediction sites.
Roy KD9RSE once again urged listeners to take advantage of the chance to see a total solar eclipse on April 8, 2024. Various sites have convenient maps of the path of totality, here (as suggested by Randy KD9VBE) and here (as posted previously to this repeater's news group, by Roy KD9RSE). Another good site is here. One can also become part of worldwide experiment in radio propagation, at this link, which the ARRL has sponsored during previous solar eclipses. (Don KA9QJG had asked about this ARRL program in a recent, previous Tech Net.)
On planet activity:
Roy KD9RSE outlined where listeners can view Jupiter (high in the sky, almost due south, after sundown) and Saturn (in the southeast sky after sundown) paired with a waxing crescent Moon on the evenings of 1/12-14, at this link (weather permitting, of course). Other planetary pairings are also outlined at that same link.
Roy KD9RSE also outlined the prospect of using ham-radio equipment to listen to interplanetary radio propagation, namely, signals from Jupiter. Possible equipment requirements and a procedure are found at this link.
On meteor activity:
While one needs no special equipment to view meteors and meteor showers by eye, there was discussion in recent Astro Nets about the prospect of employing ham equipment to monitor any faraway QSOs as a result of meteor scatter, a possible way to make long-range radio contacts. As meteors are ionized trails, the remnant trails of passing meteors in the atmosphere may act briefly to reflect radio signals.
Brandon K9PZ briefly outlined that though detection and response to far-off radio signals from meteor scatter would require coordination and timing, it is still possible to monitor such scatter with the use of software and a suitable radio set-up, as described in an overview at this link and with MSK-144 at described at this link. Meteor-related software is also found at this link.
On other items:
Randy KD9VBE extolled the virtues of using night-sky software known as Stellarium (download for free at this link for your specific operating system) and the use of space weather websites (like this one, for example) to tune in to solar conditions and other space weather phenomena.
Continue to make it your New Year's resolution in ham radio to turn on, tune in, and key up.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KA9QJG Don
KD9WFF Randall
KD9WSL Joseph
KD9VBE Randy
K9PZ Brandon
W9JOM Jim
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next Astro Net on Wednesday, January 24, 2024, at 8:00 p.m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
On solar activity:
As in previous installments, solar activity takes center stage as current solar indices show a minor solar storm toying with the popular ham bands in recent hours. Roy KD9RSE indicated that one can still make contacts across the HF bands, but the relative strength of radio propagation may come and go in mere minutes. So it goes with the unyielding effect of an active Sun on Earth's atmosphere.
Various solar indices can help to make sense of variable propagation, and, at this link is a handy web page, posted in recent Astro Net recaps, that has additional information and links on interpreting the effect of solar indices on HF bands. At this link and at this link are solar-storm prediction sites.
Roy KD9RSE once again urged listeners to take advantage of the chance to see a total solar eclipse on April 8, 2024. Various sites have convenient maps of the path of totality, here (as suggested by Randy KD9VBE) and here (as posted previously to this repeater's news group, by Roy KD9RSE). Another good site is here. One can also become part of worldwide experiment in radio propagation, at this link, which the ARRL has sponsored during previous solar eclipses. (Don KA9QJG had asked about this ARRL program in a recent, previous Tech Net.)
On planet activity:
Roy KD9RSE outlined where listeners can view Jupiter (high in the sky, almost due south, after sundown) and Saturn (in the southeast sky after sundown) paired with a waxing crescent Moon on the evenings of 1/12-14, at this link (weather permitting, of course). Other planetary pairings are also outlined at that same link.
Roy KD9RSE also outlined the prospect of using ham-radio equipment to listen to interplanetary radio propagation, namely, signals from Jupiter. Possible equipment requirements and a procedure are found at this link.
On meteor activity:
While one needs no special equipment to view meteors and meteor showers by eye, there was discussion in recent Astro Nets about the prospect of employing ham equipment to monitor any faraway QSOs as a result of meteor scatter, a possible way to make long-range radio contacts. As meteors are ionized trails, the remnant trails of passing meteors in the atmosphere may act briefly to reflect radio signals.
Brandon K9PZ briefly outlined that though detection and response to far-off radio signals from meteor scatter would require coordination and timing, it is still possible to monitor such scatter with the use of software and a suitable radio set-up, as described in an overview at this link and with MSK-144 at described at this link. Meteor-related software is also found at this link.
On other items:
Randy KD9VBE extolled the virtues of using night-sky software known as Stellarium (download for free at this link for your specific operating system) and the use of space weather websites (like this one, for example) to tune in to solar conditions and other space weather phenomena.
Continue to make it your New Year's resolution in ham radio to turn on, tune in, and key up.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KA9QJG Don
KD9WFF Randall
KD9WSL Joseph
KD9VBE Randy
K9PZ Brandon
W9JOM Jim
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next Astro Net on Wednesday, January 24, 2024, at 8:00 p.m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
Astro Net recap, for December 27, 2023
Highlights from on-the-air ham radio transmission on 147.045 MHz
For the 41st installment of the Astro Net on 12/27/2023, Roy KD9RSE and Glenn KD9PNY welcomed check-ins and listeners to discuss the night sky and share observations.
On solar activity:
As in previous installments, Glenn KD9PNY reviewed recent solar activity, including the Sun's corona; at this link, one can get a look at of the latest image from NASA's SOHO spacecraft as it views the Sun.
As solar activity has been quiet lately, so, too, have the HF bands (in general) in recent days. From previous Astro Nets, at this link, an explanation of various solar indices can help to make sense of variable propagation, and, at this link is a handy web page that has additional information and links on interpreting the effect of solar indices on HF bands. At this link and at this link are solar-storm prediction sites.
On planet activity:
Glenn KD9PNY and Roy KD9RSE directed listeners where in a cloudless sky just after sunset to view Jupiter (high in the sky, almost due south, after sundown) and Venus (in the southeast sky before sunup). For the planets and Moon on display this month and next month, go to this link, and for the whole month at this link.
On meteor activity:
As outlined in the previous installment of the Astro Net, meteor showers are the remnants of dusty debris left in the wake of a passing comet that has crossed Earth's orbit. News and location of meteor showers for December are found at this link, which, for this month, includes the Monocerotids, Geminids, Comae Berenicids, Ursids, sigma-Hydrids, eta-Hydrids, theta-Pyxidids, and the chi-, rho-, and sigma-Virginids.
Don KA9QJG wondered about those meteor trails, their possible origin and occasional color. While many meteor showers (such as the well-known annual Perseid shower in mid-August) may be sourced from a passing comet that once crossed Earth's orbit, many other meteors may simply be sporadic meteors (like those visible in December), not associated any longer with any particular long-ago comet.
While no special equipment needed to view meteors by eye, it is often better to see meteors (in general) after midnight (local time), since Earth in its orbit will plow through dusty space debris on its night side, making it visible as the ionized trails of meteors, as Earth in its orbit leads on till dawn.
But to hear meteors by ear, Brandon K9PZ says it is a worthy attempt, since those ionized trails of meteors can be a boon to amateur radio operators, if one can be set up to take advantage of the prospect to attempt meteor scatter, which is a possible way to make long-range radio contacts. As outlined in the previous installment of the Astro Net, meteor scatter requires coordination and timing, but also can be facilitated with the use of software and a suitable radio set-up, as described here. Meteor-related software is also found at this link.
On other items:
Don KA9QJG wondered on-the-air what may be the cause of sporadic radio propagation, if solar indices don't generally indicate the prospect of a good signal exchange. In reply, Roy KD9RSE offered that no single cause, but myriad causes (e.g., uneven topography, variable weather conditions) or a host of unknown nuances yet to be teased out, may lead to the ups-and-downs hams hear while on-the-air.
On a crisp, clear night with the Moon shining bright, Glenn KA9PNY described spider webs aloft on the air; that is, webs glistening "like tinsel" in the moonlight. He further asserted that webs seen high up, either in the trees, atop skyscrapers, or on decks of ships at sea, are the result of "flying spiders"; that is, those arachnids carried far and wide, aloft on the wind. Called "ballooning", the concept of spider flight apparently has some basis in fact, as described at this link.
Don KA9QJG reminded check-ins and listeners, if they're out and about during the holidays, either driving over the road or active outdoors, to be extra careful; he then detailed the recent story of a man rescued from his wrecked car under a bridge that spans Salt Creek, after being spotted by fishermen in the area. Ron K9JON also detailed his own harrowing tale, where he nearly died from drowning in the Kankakee River while fishing. The Astro Net casts a wide net when it comes to catching a variety of topics.
The Astro Net concluded with a replay of a RAIN Report by Don KA9QJG, who also announced that on this repeater a "CW Net" would debut in the near future; details to follow and to be posted at this repeater's news group.
Well wishes to all check-ins and listeners for the coming New Year.
Make it your resolution to turn on, tune in, and key up.
Happy New Year!
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
K9PZ Brandon
KD9OIQ Tony
KA9QJG Don
N9IK Nick
W9JOM Jim
K9JON Ron
KB9JVW Brad
KD9UOW David
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next Astro Net on Wednesday, January 10, 2024, at 8:00 p.m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
On solar activity:
As in previous installments, Glenn KD9PNY reviewed recent solar activity, including the Sun's corona; at this link, one can get a look at of the latest image from NASA's SOHO spacecraft as it views the Sun.
As solar activity has been quiet lately, so, too, have the HF bands (in general) in recent days. From previous Astro Nets, at this link, an explanation of various solar indices can help to make sense of variable propagation, and, at this link is a handy web page that has additional information and links on interpreting the effect of solar indices on HF bands. At this link and at this link are solar-storm prediction sites.
On planet activity:
Glenn KD9PNY and Roy KD9RSE directed listeners where in a cloudless sky just after sunset to view Jupiter (high in the sky, almost due south, after sundown) and Venus (in the southeast sky before sunup). For the planets and Moon on display this month and next month, go to this link, and for the whole month at this link.
On meteor activity:
As outlined in the previous installment of the Astro Net, meteor showers are the remnants of dusty debris left in the wake of a passing comet that has crossed Earth's orbit. News and location of meteor showers for December are found at this link, which, for this month, includes the Monocerotids, Geminids, Comae Berenicids, Ursids, sigma-Hydrids, eta-Hydrids, theta-Pyxidids, and the chi-, rho-, and sigma-Virginids.
Don KA9QJG wondered about those meteor trails, their possible origin and occasional color. While many meteor showers (such as the well-known annual Perseid shower in mid-August) may be sourced from a passing comet that once crossed Earth's orbit, many other meteors may simply be sporadic meteors (like those visible in December), not associated any longer with any particular long-ago comet.
While no special equipment needed to view meteors by eye, it is often better to see meteors (in general) after midnight (local time), since Earth in its orbit will plow through dusty space debris on its night side, making it visible as the ionized trails of meteors, as Earth in its orbit leads on till dawn.
But to hear meteors by ear, Brandon K9PZ says it is a worthy attempt, since those ionized trails of meteors can be a boon to amateur radio operators, if one can be set up to take advantage of the prospect to attempt meteor scatter, which is a possible way to make long-range radio contacts. As outlined in the previous installment of the Astro Net, meteor scatter requires coordination and timing, but also can be facilitated with the use of software and a suitable radio set-up, as described here. Meteor-related software is also found at this link.
On other items:
Don KA9QJG wondered on-the-air what may be the cause of sporadic radio propagation, if solar indices don't generally indicate the prospect of a good signal exchange. In reply, Roy KD9RSE offered that no single cause, but myriad causes (e.g., uneven topography, variable weather conditions) or a host of unknown nuances yet to be teased out, may lead to the ups-and-downs hams hear while on-the-air.
On a crisp, clear night with the Moon shining bright, Glenn KA9PNY described spider webs aloft on the air; that is, webs glistening "like tinsel" in the moonlight. He further asserted that webs seen high up, either in the trees, atop skyscrapers, or on decks of ships at sea, are the result of "flying spiders"; that is, those arachnids carried far and wide, aloft on the wind. Called "ballooning", the concept of spider flight apparently has some basis in fact, as described at this link.
Don KA9QJG reminded check-ins and listeners, if they're out and about during the holidays, either driving over the road or active outdoors, to be extra careful; he then detailed the recent story of a man rescued from his wrecked car under a bridge that spans Salt Creek, after being spotted by fishermen in the area. Ron K9JON also detailed his own harrowing tale, where he nearly died from drowning in the Kankakee River while fishing. The Astro Net casts a wide net when it comes to catching a variety of topics.
The Astro Net concluded with a replay of a RAIN Report by Don KA9QJG, who also announced that on this repeater a "CW Net" would debut in the near future; details to follow and to be posted at this repeater's news group.
Well wishes to all check-ins and listeners for the coming New Year.
Make it your resolution to turn on, tune in, and key up.
Happy New Year!
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
K9PZ Brandon
KD9OIQ Tony
KA9QJG Don
N9IK Nick
W9JOM Jim
K9JON Ron
KB9JVW Brad
KD9UOW David
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next Astro Net on Wednesday, January 10, 2024, at 8:00 p.m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
Astro Net recap, for December 13, 2023
Highlights from on-the-air ham radio transmission on 147.045 MHz
For the 40th installment of the Astro Net on 12/13/2023, Roy KD9RSE and Glenn KD9PNY welcomed check-ins and listeners to discuss the night sky and share observations.
On solar activity:
Glenn KD9PNY reviewed recent solar activity, including the Sun's corona; at this link, one can get a look at of the latest image from NASA's SOHO spacecraft as it views the Sun.
As solar activity has been up-and-down, so have the HF bands, not unexpected during a solar cycle. From previous Astro Nets, at this link, an explanation of various solar indices can help to make sense of variable propagation, and, at this link is a handy web page that has additional information and links on interpreting the effect of solar indices on HF bands. At this link is a solar storm prediction site.
On planet activity:
Glenn KD9PNY and Roy KD9RSE directed listeners where in a cloudless sky just after sunset to view Jupiter (in the east after sundown) and Venus (in the east before sunup). For the planets on display this month, go to this link, and for the whole month at this link.
On meteor activity:
As posted elsewhere in the news group for this repeater, a December meteor shower, the Geminids, is underway. News and location of its radiant at this link. Generally, meteor showers are the remnants of dusty debris left in the wake of a passing comet that has crossed Earth's orbit. But the source of the Geminids appears not to be the case, as presented at this link; that is, instead of a leftover dusty tail through which Earth plows, the source for the Geminids appears to be a rocky body like an asteroid. A cosmic puzzle for now.
No special equipment to view meteors. Just go outside and look up for this month's meteor spectacle. (Of course, one must dress sensibly for the weather.) Often better to see meteors (in general) after midnight (local time), since Earth in its orbit will plow through dusty space debris on its night side, making it visible as the ionized trails of meteors, as it leads on till dawn.
Says Brandon K9PZ, those ionized trails of meteors can be a boon to amateur radio operators, if one can be set up to take advantage of the prospect to attempt meteor scatter, a possible way to make long-range radio contacts.
Brandon K9PZ, Randy KD9VBE, and Tim K9QKE all shared their own observations of meteors across the sky.
On other items:
Roy KD9RSE reminds all that the start of Winter, already underway by the look of the landscape and the feel of the night air, is marked by the Winter Solstice, one of the bases for the construction of the modern astronomical calendar, i.e., the Gregorian calendar. Though this calendar essentially replaced the Julian calendar (which, btw, is still used), the switch to the Gregorian calendar took nearly 300 years.
By contrast, the modern meteorological calendar (which, btw, does not list the occurrence of meteor showers) follows the look of the landscape and the feel of the night air, which marks the meteorological span of the seasons more akin to former medieval calendars. Go figure.
The Astro Net concluded with well wishes to all check-ins and listeners for the coming celebration of the Christmas season.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
K9PZ Brandon
K9SGA Dan
KD9VBE Randy
KA9QJG Don
K9QKE Tim
KD9HOK Greg
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next Astro Net on Wednesday, December 27, 2023, at 8:00 p.m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
On solar activity:
Glenn KD9PNY reviewed recent solar activity, including the Sun's corona; at this link, one can get a look at of the latest image from NASA's SOHO spacecraft as it views the Sun.
As solar activity has been up-and-down, so have the HF bands, not unexpected during a solar cycle. From previous Astro Nets, at this link, an explanation of various solar indices can help to make sense of variable propagation, and, at this link is a handy web page that has additional information and links on interpreting the effect of solar indices on HF bands. At this link is a solar storm prediction site.
On planet activity:
Glenn KD9PNY and Roy KD9RSE directed listeners where in a cloudless sky just after sunset to view Jupiter (in the east after sundown) and Venus (in the east before sunup). For the planets on display this month, go to this link, and for the whole month at this link.
On meteor activity:
As posted elsewhere in the news group for this repeater, a December meteor shower, the Geminids, is underway. News and location of its radiant at this link. Generally, meteor showers are the remnants of dusty debris left in the wake of a passing comet that has crossed Earth's orbit. But the source of the Geminids appears not to be the case, as presented at this link; that is, instead of a leftover dusty tail through which Earth plows, the source for the Geminids appears to be a rocky body like an asteroid. A cosmic puzzle for now.
No special equipment to view meteors. Just go outside and look up for this month's meteor spectacle. (Of course, one must dress sensibly for the weather.) Often better to see meteors (in general) after midnight (local time), since Earth in its orbit will plow through dusty space debris on its night side, making it visible as the ionized trails of meteors, as it leads on till dawn.
Says Brandon K9PZ, those ionized trails of meteors can be a boon to amateur radio operators, if one can be set up to take advantage of the prospect to attempt meteor scatter, a possible way to make long-range radio contacts.
Brandon K9PZ, Randy KD9VBE, and Tim K9QKE all shared their own observations of meteors across the sky.
On other items:
Roy KD9RSE reminds all that the start of Winter, already underway by the look of the landscape and the feel of the night air, is marked by the Winter Solstice, one of the bases for the construction of the modern astronomical calendar, i.e., the Gregorian calendar. Though this calendar essentially replaced the Julian calendar (which, btw, is still used), the switch to the Gregorian calendar took nearly 300 years.
By contrast, the modern meteorological calendar (which, btw, does not list the occurrence of meteor showers) follows the look of the landscape and the feel of the night air, which marks the meteorological span of the seasons more akin to former medieval calendars. Go figure.
The Astro Net concluded with well wishes to all check-ins and listeners for the coming celebration of the Christmas season.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
K9PZ Brandon
K9SGA Dan
KD9VBE Randy
KA9QJG Don
K9QKE Tim
KD9HOK Greg
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next Astro Net on Wednesday, December 27, 2023, at 8:00 p.m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
Astro Net recap, for November 22, 2023
Highlights from on-the-air ham radio transmission on 147.045 MHz
For the 39th installment of the Astro Net on 11/22/2023, Roy KD9RSE and Glenn KD9PNY welcomed check-ins and listeners to discuss the night sky and share observations.
On solar activity:
Glenn KD9PNY reviewed recent solar activity, including filament lifts of the Sun's corona: also, a geomagnetic storm headed our way (at that same link), due to arrive in the coming days.
From previous Astro Nets, at this link, an explanation of various solar indices can help to make sense of variable propagation, and, at this link is a handy web page that has additional information and links on interpreting the effect of solar indices on HF bands.
On planet activity:
Glenn KD9PNY and Roy KD9RSE directed listeners where in a cloudless sky just after sunset to view Jupiter (in the east after sundown), Saturn, (in the southeast after sundown), and Venus (in the east before sunup). For the planets on display this month, go to this link and at this link for where to find them in the night sky.
On other items:
Don KA9QJG asked about his recent post to the news group about reported radio emissions from Jupiter, particularly decametric emissions (or, radio emissions with wavelengths from ten meters to a hundred meters). First discovered in 1955, these emissions defy complete explanation, though scientists appear to agree that Jupiter's moon Io may have some disturbing effect on Jupiter magnetic field, which enhances Jupiter's radio emissions, often in the 22-MHz range, as that moon orbits Jupiter; these emissions also appear to be directional. Evidently, these emissions can be detected by amateur radio operators with the correct equipment, such as a simple dipole, and knowing the timing for when to intercept these directional emissions as radio bursts. Apparently, at least two groups of emissions, as bursts, have their own distinct sounds.
The Astro Net concluded with well wishes to all check-ins and listeners for their celebration of the national holiday of Thanksgiving.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
W9JOM Jim
KD9IQU Nick
K9PZ Brandon
KA9QJG Don
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next Astro Net on Wednesday, December 13, 2023, at 8:00 p.m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
On solar activity:
Glenn KD9PNY reviewed recent solar activity, including filament lifts of the Sun's corona: also, a geomagnetic storm headed our way (at that same link), due to arrive in the coming days.
From previous Astro Nets, at this link, an explanation of various solar indices can help to make sense of variable propagation, and, at this link is a handy web page that has additional information and links on interpreting the effect of solar indices on HF bands.
On planet activity:
Glenn KD9PNY and Roy KD9RSE directed listeners where in a cloudless sky just after sunset to view Jupiter (in the east after sundown), Saturn, (in the southeast after sundown), and Venus (in the east before sunup). For the planets on display this month, go to this link and at this link for where to find them in the night sky.
On other items:
Don KA9QJG asked about his recent post to the news group about reported radio emissions from Jupiter, particularly decametric emissions (or, radio emissions with wavelengths from ten meters to a hundred meters). First discovered in 1955, these emissions defy complete explanation, though scientists appear to agree that Jupiter's moon Io may have some disturbing effect on Jupiter magnetic field, which enhances Jupiter's radio emissions, often in the 22-MHz range, as that moon orbits Jupiter; these emissions also appear to be directional. Evidently, these emissions can be detected by amateur radio operators with the correct equipment, such as a simple dipole, and knowing the timing for when to intercept these directional emissions as radio bursts. Apparently, at least two groups of emissions, as bursts, have their own distinct sounds.
The Astro Net concluded with well wishes to all check-ins and listeners for their celebration of the national holiday of Thanksgiving.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
W9JOM Jim
KD9IQU Nick
K9PZ Brandon
KA9QJG Don
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next Astro Net on Wednesday, December 13, 2023, at 8:00 p.m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
Astro Net recap, for November 8, 2023
Highlights from on-the-air ham radio transmission on 147.045 MHz
For the 38th installment of the Astro Net on 11/8/2023, Roy KD9RSE and Glenn KD9PNY piloted the Astro Net into orbit. It was fairly rough and scratchy ride, as Mother Nature may have had some effect on VHF/UHF propagation, but all were welcomed to discuss the night sky and share observations.
On solar activity:
Roy KD9RSE briefly outlined that recent solar activity has played with bands lately. The current solar indices continue to cause some up-and-down in radio propagation, which is not unusual, even during an active solar cycle.
From previous Astro Nets, at this link, an explanation of various solar indices can help to make sense of variable propagation, and, at this link is a handy web page that has additional information and links on interpreting the effect of solar indices on HF bands.
While an active Sun lashes Earth with radiation and high-energy particles to cause auroras, there are night-sky glowing phenomena that astronomers are unable to explain completely; one such phenomenon is abbreviated as SAR, at this link, the other is abbreviated as STEVE, at this link.
On planet activity:
Glenn KD9PNY outlined where to look and what to see, for the planets on display this month; so, at this link is where to find them in the night sky either after sundown or before sunup.
On lunar activity:
Roy KD9RSE alerted listeners to the prospect of seeing a pairing of the brilliant planet Venus with the waning crescent Moon before sunup on November 9. If it's clear, then get up early to see a pleasing sight in the pre-dawn sky; at this link is what this pairing may look like. Btw, on this date today the Moon passed in front of Venus, known as an occultation, but that apparition was not visible in the Midwest.
On other items:
For this month, there are meteor showers, visible from their various radiants in the night sky; meteor showers are named by the constellation (or star pattern) out of which they appear to radiate. The Orionids, Taurids, and Leonids are the more prominent showers to view.
Roy KD9RSE reminded check-ins and all listeners on the upcoming total solar eclipse on April 8, 2024. It's not too early to look into its details, select a suitable spot to view, and get ready to witness a splendid sight of nature.
Glenn KD9RSE informed listeners that the ARES D-1 Net may attempt propagation experiments during the solar eclipse. Some possible ham-radio experiments are described at this link and past experiments from previous eclipses are posted at this link.
While propagation was choppy at times this evening, the Astro Net concluded relatively early.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KD9VBE Randy
W9ABN Ed
N9IK Nick
KD9HOK Greg
KA9QJG Don
W9JOM Jim
KD9AQO Brian (late check-in)
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next Astro Net on Wednesday, November 22, 2023, at 8:00 p.m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
On solar activity:
Roy KD9RSE briefly outlined that recent solar activity has played with bands lately. The current solar indices continue to cause some up-and-down in radio propagation, which is not unusual, even during an active solar cycle.
From previous Astro Nets, at this link, an explanation of various solar indices can help to make sense of variable propagation, and, at this link is a handy web page that has additional information and links on interpreting the effect of solar indices on HF bands.
While an active Sun lashes Earth with radiation and high-energy particles to cause auroras, there are night-sky glowing phenomena that astronomers are unable to explain completely; one such phenomenon is abbreviated as SAR, at this link, the other is abbreviated as STEVE, at this link.
On planet activity:
Glenn KD9PNY outlined where to look and what to see, for the planets on display this month; so, at this link is where to find them in the night sky either after sundown or before sunup.
On lunar activity:
Roy KD9RSE alerted listeners to the prospect of seeing a pairing of the brilliant planet Venus with the waning crescent Moon before sunup on November 9. If it's clear, then get up early to see a pleasing sight in the pre-dawn sky; at this link is what this pairing may look like. Btw, on this date today the Moon passed in front of Venus, known as an occultation, but that apparition was not visible in the Midwest.
On other items:
For this month, there are meteor showers, visible from their various radiants in the night sky; meteor showers are named by the constellation (or star pattern) out of which they appear to radiate. The Orionids, Taurids, and Leonids are the more prominent showers to view.
Roy KD9RSE reminded check-ins and all listeners on the upcoming total solar eclipse on April 8, 2024. It's not too early to look into its details, select a suitable spot to view, and get ready to witness a splendid sight of nature.
Glenn KD9RSE informed listeners that the ARES D-1 Net may attempt propagation experiments during the solar eclipse. Some possible ham-radio experiments are described at this link and past experiments from previous eclipses are posted at this link.
While propagation was choppy at times this evening, the Astro Net concluded relatively early.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KD9VBE Randy
W9ABN Ed
N9IK Nick
KD9HOK Greg
KA9QJG Don
W9JOM Jim
KD9AQO Brian (late check-in)
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next Astro Net on Wednesday, November 22, 2023, at 8:00 p.m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
Astro Net recap, for October 25, 2023
Highlights from on-the-air ham radio transmission on 147.045 MHz
For the 37th installment of the Astro Net on 10/25/2023, Glenn KD9PNY took a leave of absence, to rest up on board the mothership; so, Roy KD9RSE piloted the Astro Net solo into orbit. Propagation in-flight was occasionally rough, but check-ins were still welcomed to discuss the night sky and share observations.
On solar activity:
Roy KD9RSE briefly outlined recent solar activity, which included a reported lowering of the current sunspot number, as described at this link. The current solar indices have caused some up-and-down in radio propagation, which is not unusual, even during an active solar cycle. While the 40-meter and 20-meter bands have generally been Ok from time-to-time, the 10-, 12-, and 15-meter bands have been busy with activity but with variable propagation.
From previous Astro Nets, at this link, an explanation of various solar indices can help to make sense of variable propagation, and, at this link is a handy web page that has additional information and links on interpreting the effect of solar indices on HF bands.
On planet activity:
The planets again are on display; so, at this link is where to find them in the night sky either after sundown or before sunup.
On lunar activity:
Since there was a solar eclipse (an annular one about two weeks ago, though not visible fully across the repeater's area of coverage), there must follow a lunar eclipse. That eclipse, a partial lunar one, will occur on Oct. 28, but will not be visible in the Midwest.
On other items:
Roy KD9RSE attended the Illinois Dark Skies Star Party at the Panther Creek Wildlife Area about two weeks ago. The same cloudy and rainy weather that perhaps kept those sky watchers in the repeater area from viewing the solar eclipse on Oct. 14 (as a partial phenomenon) also kept stargazers at Panther Creek huddled in their tents by day, for the most part.
Good seeing at the start of the star party and a gap in the foul weather on the next night were welcome, but this particular star party did not yield the best results for viewing for its entire run. As a POTA activation site, too, Roy KD9RSE did not have great success, as the weather evidently kept band conditions too variable to make decent QSOs.
To make your own next star party a success, or, just to have good observing all to yourself, the selection of some decent optical aid is essential. At this link is an overview of what to look for in choosing a telescope that's right for you.
Randy KD9VBE marveled that the original Voyager 1, launched in the mid-1970's, stills speeds away into interstellar space, as described in an article from Space.com; at present, the craft is 12 billion miles from Earth and still receiving commands and programming updates to keep it functioning. (The spacecraft uses FORTRAN!)
While propagation during the Astro Net seemed fairly variable and choppy at times this evening, apologies to those check-ins not visited on-the-air by Roy KD9RSE for their 73 round.
On solar activity:
Roy KD9RSE briefly outlined recent solar activity, which included a reported lowering of the current sunspot number, as described at this link. The current solar indices have caused some up-and-down in radio propagation, which is not unusual, even during an active solar cycle. While the 40-meter and 20-meter bands have generally been Ok from time-to-time, the 10-, 12-, and 15-meter bands have been busy with activity but with variable propagation.
From previous Astro Nets, at this link, an explanation of various solar indices can help to make sense of variable propagation, and, at this link is a handy web page that has additional information and links on interpreting the effect of solar indices on HF bands.
On planet activity:
The planets again are on display; so, at this link is where to find them in the night sky either after sundown or before sunup.
On lunar activity:
Since there was a solar eclipse (an annular one about two weeks ago, though not visible fully across the repeater's area of coverage), there must follow a lunar eclipse. That eclipse, a partial lunar one, will occur on Oct. 28, but will not be visible in the Midwest.
On other items:
Roy KD9RSE attended the Illinois Dark Skies Star Party at the Panther Creek Wildlife Area about two weeks ago. The same cloudy and rainy weather that perhaps kept those sky watchers in the repeater area from viewing the solar eclipse on Oct. 14 (as a partial phenomenon) also kept stargazers at Panther Creek huddled in their tents by day, for the most part.
Good seeing at the start of the star party and a gap in the foul weather on the next night were welcome, but this particular star party did not yield the best results for viewing for its entire run. As a POTA activation site, too, Roy KD9RSE did not have great success, as the weather evidently kept band conditions too variable to make decent QSOs.
To make your own next star party a success, or, just to have good observing all to yourself, the selection of some decent optical aid is essential. At this link is an overview of what to look for in choosing a telescope that's right for you.
Randy KD9VBE marveled that the original Voyager 1, launched in the mid-1970's, stills speeds away into interstellar space, as described in an article from Space.com; at present, the craft is 12 billion miles from Earth and still receiving commands and programming updates to keep it functioning. (The spacecraft uses FORTRAN!)
While propagation during the Astro Net seemed fairly variable and choppy at times this evening, apologies to those check-ins not visited on-the-air by Roy KD9RSE for their 73 round.
Astro Net recap, for October 11, 2023
Highlights from on-the-air ham radio transmission on 147.045 MHz
For the 36th installment of the Astro Net on 10/11/2023, Glenn KD9PNY launched the Astro Net while Roy KD9RSE switched to the "440" band (due to some propagation problem from his shack) and then joined in to help pilot the Net bird into orbit. Check-ins were welcomed to discuss the night sky and share observations.
On solar activity:
Glenn KD9PNY outlined recent solar activity , which included fascinating filaments across the disk of the Sun. The current solar indices have caused some up-and-down in radio propagation; but, while the 20-meter band has been up-and-down (great Rx/Tx one minute, faded out the next), the 10-, 12-, and 15-meter bands have been bristling with activity in recent days. Of course, this is not unusual, even during an active solar cycle.
From the previous Astro Net, at this link, an explanation of various solar indices can help to make sense of variable propagation, and, at this link is a handy web page that has additional information and links on interpreting the effect of solar indices on HF bands.
On planet activity:
For those who like to gaze at planets, like the last Astro Net, Glenn KD9PNY outlined where to find them in the night sky either after sundown or before sunup. At this link is a discussion of what planets to see for this time of month.
On lunar activity:
As seen from Earth, an eclipse always involves the Moon. There is a solar eclipse on October 14, known as an annular eclipse (where the Moon partly covers the Sun, displaying a ring of sunlight in the sky); but, it won't be fully visible in the Midwest; only a partial eclipse may be seen, if it's not cloudy. At this link are the details of what one can see from the KA9QJG repeater's general coverage area.
Maximum (partial) eclipse over most of the repeater area will occur just before at 12 Noon on Saturday, 10/14, though can watch the dark of the Moon encroach across the bright face of the Sun with some common-sense safety tips.
Here are two safe ways to see that partial eclipse: by looking for it on the ground, or, by looking at it through a welder's faceplate.
That is, during a partial solar eclipse, the Moon only blocks a portion of the Sun (as we'll have the chance to see this Saturday, 10/14, weather permitting); so, an uncommon "crescent Sun" is visible. Look for crescent suns on the ground, where sunlight filters through the leaves of trees or through objects that have small holes. At this link is an example of what you might see.
One can also use a #14 welder's glass (and only #14 glass, since other shades don't block out enough sunlight) to view the partial eclipse we can see here. Hold the faceplate in front of your eyes to take a brief glimpse of the Sun during the partial eclipse we'll see here. Of course, through a welder's glass, the crescent Sun will appear green.
A faceplate may be available from a plumbing supply outlet (like Airgas; store locator at this link). Use it briefly; of course don't stare at the Sun, even with a faceplate. Solar eclipse glasses may be Ok to use to view the partial solar eclipse this Saturday. Not all eclipse glasses are made the same, as some are made of darkened plastic or of thin mylar; not all eclipse glasses may be Sun-worthy.
On other items:
Glenn KD9PNY reminded check-ins of the chance to see various meteor showers. At this link is a current list and where to look in the coming days. Here is a link for the upcoming peak of the Orionids shower (which appears to emanate from the constellation Orion, the Hunter); here is a link for the recent Draconids shower (which has appeared to radiate from the constellation Draco, the Dragon).
As meteor showers are named after the star pattern out of which they appear to originate, random meteors can be glimpsed most any time after midnight (when Earth in its orbit plows into old comet dust and debris), though their appearance is sporadic and unpredictable. But as to where to find constellations that may have meteor showers to view, Roy KD9RSE gave a quick tip on observing, namely, that if one wants to know the star patterns to be visible at night, say, by next season, one can rise before sunup and see the sky before dawn. That is, a particular season's nighttime sky can be glimpsed one season ahead, by looking at the night sky in the morning before sunrise. Rise before dawn and see Orion in the pre-dawn sky right now; but, by Winter, Orion will only be visible at night after sunset.
Bill KD9YBK asked about the prospects for trying out meteor scatter with amateur radio. While it's a neat item for amateur radio operators to try, its attempt likely requires time, effort, patience, and money. At this link, this link, this link, and this link are discussions on radio set-up, modes and bands to use, and a general "how-to" for hams.
While Glenn KD9PNY discussed a recent road trip that he took to gaze at dark skies, he reminded check-ins and listeners about the wonders to be seen by "just looking up" when you get the chance, especially at a dark-sky locale. Coincidentally, Roy KD9RSE will be at a dark-sky site this coming weekend, namely, the Illinois Dark Skies Star Party in Illinois at the Panther Creek Wildlife Area. He will also do a POTA activation from that site, depending on ham-radio band conditions.
Thanks to all who checked in to the Astro Net ~
KD9PNY Glenn
KD9RSE Roy
KA9QJG Don
KD9YBK Bill
KD2GSW Al
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next Astro Net on Wednesday, October 25, 2023, at 8:00 p.m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
On solar activity:
Glenn KD9PNY outlined recent solar activity , which included fascinating filaments across the disk of the Sun. The current solar indices have caused some up-and-down in radio propagation; but, while the 20-meter band has been up-and-down (great Rx/Tx one minute, faded out the next), the 10-, 12-, and 15-meter bands have been bristling with activity in recent days. Of course, this is not unusual, even during an active solar cycle.
From the previous Astro Net, at this link, an explanation of various solar indices can help to make sense of variable propagation, and, at this link is a handy web page that has additional information and links on interpreting the effect of solar indices on HF bands.
On planet activity:
For those who like to gaze at planets, like the last Astro Net, Glenn KD9PNY outlined where to find them in the night sky either after sundown or before sunup. At this link is a discussion of what planets to see for this time of month.
On lunar activity:
As seen from Earth, an eclipse always involves the Moon. There is a solar eclipse on October 14, known as an annular eclipse (where the Moon partly covers the Sun, displaying a ring of sunlight in the sky); but, it won't be fully visible in the Midwest; only a partial eclipse may be seen, if it's not cloudy. At this link are the details of what one can see from the KA9QJG repeater's general coverage area.
Maximum (partial) eclipse over most of the repeater area will occur just before at 12 Noon on Saturday, 10/14, though can watch the dark of the Moon encroach across the bright face of the Sun with some common-sense safety tips.
Here are two safe ways to see that partial eclipse: by looking for it on the ground, or, by looking at it through a welder's faceplate.
That is, during a partial solar eclipse, the Moon only blocks a portion of the Sun (as we'll have the chance to see this Saturday, 10/14, weather permitting); so, an uncommon "crescent Sun" is visible. Look for crescent suns on the ground, where sunlight filters through the leaves of trees or through objects that have small holes. At this link is an example of what you might see.
One can also use a #14 welder's glass (and only #14 glass, since other shades don't block out enough sunlight) to view the partial eclipse we can see here. Hold the faceplate in front of your eyes to take a brief glimpse of the Sun during the partial eclipse we'll see here. Of course, through a welder's glass, the crescent Sun will appear green.
A faceplate may be available from a plumbing supply outlet (like Airgas; store locator at this link). Use it briefly; of course don't stare at the Sun, even with a faceplate. Solar eclipse glasses may be Ok to use to view the partial solar eclipse this Saturday. Not all eclipse glasses are made the same, as some are made of darkened plastic or of thin mylar; not all eclipse glasses may be Sun-worthy.
On other items:
Glenn KD9PNY reminded check-ins of the chance to see various meteor showers. At this link is a current list and where to look in the coming days. Here is a link for the upcoming peak of the Orionids shower (which appears to emanate from the constellation Orion, the Hunter); here is a link for the recent Draconids shower (which has appeared to radiate from the constellation Draco, the Dragon).
As meteor showers are named after the star pattern out of which they appear to originate, random meteors can be glimpsed most any time after midnight (when Earth in its orbit plows into old comet dust and debris), though their appearance is sporadic and unpredictable. But as to where to find constellations that may have meteor showers to view, Roy KD9RSE gave a quick tip on observing, namely, that if one wants to know the star patterns to be visible at night, say, by next season, one can rise before sunup and see the sky before dawn. That is, a particular season's nighttime sky can be glimpsed one season ahead, by looking at the night sky in the morning before sunrise. Rise before dawn and see Orion in the pre-dawn sky right now; but, by Winter, Orion will only be visible at night after sunset.
Bill KD9YBK asked about the prospects for trying out meteor scatter with amateur radio. While it's a neat item for amateur radio operators to try, its attempt likely requires time, effort, patience, and money. At this link, this link, this link, and this link are discussions on radio set-up, modes and bands to use, and a general "how-to" for hams.
While Glenn KD9PNY discussed a recent road trip that he took to gaze at dark skies, he reminded check-ins and listeners about the wonders to be seen by "just looking up" when you get the chance, especially at a dark-sky locale. Coincidentally, Roy KD9RSE will be at a dark-sky site this coming weekend, namely, the Illinois Dark Skies Star Party in Illinois at the Panther Creek Wildlife Area. He will also do a POTA activation from that site, depending on ham-radio band conditions.
Thanks to all who checked in to the Astro Net ~
KD9PNY Glenn
KD9RSE Roy
KA9QJG Don
KD9YBK Bill
KD2GSW Al
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next Astro Net on Wednesday, October 25, 2023, at 8:00 p.m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
Astro Net recap, for September 27, 2023
Highlights from on-the-air ham radio transmission on 147.045 MHz
For the 35th installment of the Astro Net on 9/27/2023, Roy KD9RSE welcomed check-ins to discuss the night sky and share observations. Glenn KD9PNY was unavailable this evening to co-pilot the Astro Net mother ship.
On solar activity:
Roy KD9RSE outlined recent solar activity that has resulted in some radio disruption. For example, propagation on the popular HF bands continues to be up-and-down, but that's not unusual, even during an active solar cycle. At this link, an explanation of various solar indices can help to make sense of variable propagation, and, hams know that a variety of regional (and even local) circumstances can enhance or diminish propagation. At this link is a handy web page that has additional information and links on interpreting the effect of solar indices on HF bands; likely many hams already know and use these links.
On planet activity:
For those who like to gaze at planets, at this link is a rundown of what planets to see and where to find them in the night sky either after sundown or before sunup.
On lunar activity:
This month the Moon at its full phase is known as the Harvest Moon, the closest Full Moon to the Autumnal Equinox, the light of which after sunset was thought to help farmers bring in the crops. In addition, this month's Full Moon is a so-called Supermoon, when the monthly closest approach of the Moon to Earth coincides with its full phase, which makes the Moon appear slightly larger and brighter than usual. Also, as the Harvest Moon rises, its anticipated pumpkin-orange hue is due to dust and aerosols in the air, which filter out a portion of the Moon's light, making it appear orange on its rising. Also, the Moon can appear huge on rising, an optical illusion when it's seen behind objects near or at the local horizon.
On telescope selection:
To view the night sky, optical aid is necessary. Roy KD9RSE answered requests for information from Tony KC9LGE about selecting that right aid to view the night skies, at this link. What one may like to look at in the sky likely would influence what one might like to observe and some of the jargon that describes scopes' operation; but, one does not need to spend huge sums of money to view the night sky. Btw, there are simple scopes that kids can build or serious projects for older folks. Major telescope manufacturers include Celestron and Meade; a major distributor is Orion.
Greg KD9HOK described at least one kind of reflecting telescope, namely, the Dobsonian model, which can be a good choice for its ease of operation and relative portability. Since this kind of telescope swings and tilts, one can locate sky objects by their azimuth and altitude, rather than having to use celestial coordinates like right ascension and declination, though one can convert altitude and azimuth to celestial coordinates with the calculator at this link.
Btw, the so-called "Dobsonian" telescope is named after the late John Dobson, a former monk of the Ramakrishna Order, who, after being asked to leave that Order's monastery for his late nights away at stargazing, pioneered and promoted the crafting of large-aperture telescopes for amateur astronomers. These scopes can be large or small and fairly portable in the field, but favor the use of large-aperture telescope mirrors, making the night-sky even more for the amateur astronomer or even the casual stargazer.
On other items:
Roy KD9RSE reminded check-ins and the listening audience about the total solar eclipse on April 8, 2024 that will be visible through part of the KA9QJG repeater's range. Though it's still six months away, one may want a good location to view it, as traffic will be jamming the roadways that day. In the meantime, there is another solar eclipse on October 14, an annular eclipse, but it won't be fully visible in the Midwest; only a partial eclipse may be seen, if it's not cloudy.
Here are two safe ways to see that partial eclipse: by looking for it on the ground, or, by looking at it through a welder's faceplate.
That is, during a partial solar eclipse, the Moon only blocks a portion of the Sun (as we'll have the chance to see in October); so, an uncommon "crescent Sun" is visible. Look for crescent suns on the ground, where sunlight filters through the leaves of trees or through objects that have small holes. At this link is an example of what you might see.
One can also use a #14 welder's glass (and only #14 glass, since other shades don't block out enough sunlight) to view the partial eclipse we can see here. A faceplate may be available from a plumbing supply outlet (like Airgas; store locator at this link). Use it briefly; of course don't stare at the Sun, even with a faceplate.
For general sky-gazing and a chance to see those telescopes one might buy or use, one also visit a star party, which is like a hamfest but for amateur astronomers. Here's a general, partial list of those star parties one might find from year-to-year, as each region of the country usually has its own appeal to stargazers. The nearest next one is in Illinois, this link, at the Panther Creek State Fish Wildlife Area, Oct. 12-15. It's also a location for POTA activators.
For better observing, Don KA9QJG wondered about the conditions to see the night sky. Clouds, fog, smoke, and haze will limit one's view, but it is possible to see some stars and planets through (perhaps) a thin fog or through haze; on Summer nights, a slightly hazy sky may be preferable for lunar and planetary observing. (Here are tips for observing the planets.)
Don KA9QJG also asked whether sky observers could operate a telescope remotely. Such capability is available, and, one can choose the degree to which a telescope might be automated outside, to be operated indoors by remote control and to provide live, on-screen night-sky views. (Here's an example of an observatory built along with an adjacent, weather-resistant "warm room" for operating a telescope by remote control.)
Shad KD9EJE shared his observation of the Big Dipper (even in urban skies), as imaged with a cell phone. His images are already posted to the news group. Neat to see what one might view without excessive urban and suburban lighting.
Finally, one can also look to do skygazing by ham radio, namely, by looking for the International Space Station (for example, at this link) when it's due to pass near your QTH. One can then attempt to activate its on-board repeater as it passes across the sky. Randy KD9VBE outlined a procedure that he's used successfully with a handheld transceiver. (Read about contacting the ISS at this link.)
The Astro Net closed with thanks to all check-ins, and, to those who listen to the Net on RadioReference.com. One can also find current and past installments of the Astro Net, not only through postings of recaps at the KA9QJG repeater news group but also at this website. For podcasts about the Sun and radio propagation, visit this site with Tamitha Skov, the Space Weather Woman.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KC9LGE Tony
KD9EJE Shad
KA9QJG Don
KD9VBE Randy
KD9HOK Greg
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next Astro Net on Wednesday, October 11, 2023, at 8:00 p.m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
On solar activity:
Roy KD9RSE outlined recent solar activity that has resulted in some radio disruption. For example, propagation on the popular HF bands continues to be up-and-down, but that's not unusual, even during an active solar cycle. At this link, an explanation of various solar indices can help to make sense of variable propagation, and, hams know that a variety of regional (and even local) circumstances can enhance or diminish propagation. At this link is a handy web page that has additional information and links on interpreting the effect of solar indices on HF bands; likely many hams already know and use these links.
On planet activity:
For those who like to gaze at planets, at this link is a rundown of what planets to see and where to find them in the night sky either after sundown or before sunup.
On lunar activity:
This month the Moon at its full phase is known as the Harvest Moon, the closest Full Moon to the Autumnal Equinox, the light of which after sunset was thought to help farmers bring in the crops. In addition, this month's Full Moon is a so-called Supermoon, when the monthly closest approach of the Moon to Earth coincides with its full phase, which makes the Moon appear slightly larger and brighter than usual. Also, as the Harvest Moon rises, its anticipated pumpkin-orange hue is due to dust and aerosols in the air, which filter out a portion of the Moon's light, making it appear orange on its rising. Also, the Moon can appear huge on rising, an optical illusion when it's seen behind objects near or at the local horizon.
On telescope selection:
To view the night sky, optical aid is necessary. Roy KD9RSE answered requests for information from Tony KC9LGE about selecting that right aid to view the night skies, at this link. What one may like to look at in the sky likely would influence what one might like to observe and some of the jargon that describes scopes' operation; but, one does not need to spend huge sums of money to view the night sky. Btw, there are simple scopes that kids can build or serious projects for older folks. Major telescope manufacturers include Celestron and Meade; a major distributor is Orion.
Greg KD9HOK described at least one kind of reflecting telescope, namely, the Dobsonian model, which can be a good choice for its ease of operation and relative portability. Since this kind of telescope swings and tilts, one can locate sky objects by their azimuth and altitude, rather than having to use celestial coordinates like right ascension and declination, though one can convert altitude and azimuth to celestial coordinates with the calculator at this link.
Btw, the so-called "Dobsonian" telescope is named after the late John Dobson, a former monk of the Ramakrishna Order, who, after being asked to leave that Order's monastery for his late nights away at stargazing, pioneered and promoted the crafting of large-aperture telescopes for amateur astronomers. These scopes can be large or small and fairly portable in the field, but favor the use of large-aperture telescope mirrors, making the night-sky even more for the amateur astronomer or even the casual stargazer.
On other items:
Roy KD9RSE reminded check-ins and the listening audience about the total solar eclipse on April 8, 2024 that will be visible through part of the KA9QJG repeater's range. Though it's still six months away, one may want a good location to view it, as traffic will be jamming the roadways that day. In the meantime, there is another solar eclipse on October 14, an annular eclipse, but it won't be fully visible in the Midwest; only a partial eclipse may be seen, if it's not cloudy.
Here are two safe ways to see that partial eclipse: by looking for it on the ground, or, by looking at it through a welder's faceplate.
That is, during a partial solar eclipse, the Moon only blocks a portion of the Sun (as we'll have the chance to see in October); so, an uncommon "crescent Sun" is visible. Look for crescent suns on the ground, where sunlight filters through the leaves of trees or through objects that have small holes. At this link is an example of what you might see.
One can also use a #14 welder's glass (and only #14 glass, since other shades don't block out enough sunlight) to view the partial eclipse we can see here. A faceplate may be available from a plumbing supply outlet (like Airgas; store locator at this link). Use it briefly; of course don't stare at the Sun, even with a faceplate.
For general sky-gazing and a chance to see those telescopes one might buy or use, one also visit a star party, which is like a hamfest but for amateur astronomers. Here's a general, partial list of those star parties one might find from year-to-year, as each region of the country usually has its own appeal to stargazers. The nearest next one is in Illinois, this link, at the Panther Creek State Fish Wildlife Area, Oct. 12-15. It's also a location for POTA activators.
For better observing, Don KA9QJG wondered about the conditions to see the night sky. Clouds, fog, smoke, and haze will limit one's view, but it is possible to see some stars and planets through (perhaps) a thin fog or through haze; on Summer nights, a slightly hazy sky may be preferable for lunar and planetary observing. (Here are tips for observing the planets.)
Don KA9QJG also asked whether sky observers could operate a telescope remotely. Such capability is available, and, one can choose the degree to which a telescope might be automated outside, to be operated indoors by remote control and to provide live, on-screen night-sky views. (Here's an example of an observatory built along with an adjacent, weather-resistant "warm room" for operating a telescope by remote control.)
Shad KD9EJE shared his observation of the Big Dipper (even in urban skies), as imaged with a cell phone. His images are already posted to the news group. Neat to see what one might view without excessive urban and suburban lighting.
Finally, one can also look to do skygazing by ham radio, namely, by looking for the International Space Station (for example, at this link) when it's due to pass near your QTH. One can then attempt to activate its on-board repeater as it passes across the sky. Randy KD9VBE outlined a procedure that he's used successfully with a handheld transceiver. (Read about contacting the ISS at this link.)
The Astro Net closed with thanks to all check-ins, and, to those who listen to the Net on RadioReference.com. One can also find current and past installments of the Astro Net, not only through postings of recaps at the KA9QJG repeater news group but also at this website. For podcasts about the Sun and radio propagation, visit this site with Tamitha Skov, the Space Weather Woman.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KC9LGE Tony
KD9EJE Shad
KA9QJG Don
KD9VBE Randy
KD9HOK Greg
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next Astro Net on Wednesday, October 11, 2023, at 8:00 p.m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
Astro Net recap, for September 13, 2023
Highlights from on-the-air ham radio transmission on 147.045 MHz
For the 34th installment of the Astro Net on 9/13/2023, Roy KD9RSE and Glenn KD9PNY welcomed check-ins to discuss the night sky and share observations.
On solar activity:
As with previous Nets, Glenn KD9PNY and Roy KD9RSE outlined recent solar activity that has resulted in some radio disruption, though propagation's ups-and-downs have not been unusual, just spotty.
On comet activity:
Glenn KD9PNY briefed check-ins on the recent discovery of Comet Nishimura, a fast-moving "green" comet (i.e., a comet of apparent green color due to its composition). Viewing the faint comet may be a challenge if the sky is somewhat bright, as it was visible in morning twilight before dawn, but has passed into evening twilight at sunset, at this link.
On planet activity:
Also as in previous Nets, Glenn KD9PNY reported on what one can see of the planets.
On telescope selection:
As with any good attempt to view the night sky, optical aid is necessary. Roy KD9RSE outlined some aspects on selecting that right aid for your own eyes to view the night skies, at this link.
On other items:
Roy KD9RSE reminded check-ins and the listening audience about the total solar eclipse on April 8, 2024 that will be visible through part of the KA9QJG repeater's range. Though it's just over six months away, one may want to prepare for the eclipse with a good location to view it, as roads may be jammed with sky observers and the curious motoring into the area. (By the way, there is another solar eclipse next month, an annular eclipse, but it's not visible live in the Midwest.)
Roy KD9RSE also alerted all to the prospect of seeing an upcoming neat effect with a geochron. (You can download a free geochron at this link and customize it to your QTH.) That is, on the first day of Fall (at the Autumnal Equinox), the greylines on a geochron will appear vertical; neat to see.
The Astro Net then turned into the Arachnid Net, and became all about spiders. That is, Greg KD9HOK commented on-the-air with a live description of a spider building its web across the lens of his QTH's security camera. Other check-ins related their similar observations and all pondered the reason for this preference for security cameras, perhaps due the spider's ability to see various wavelengths, including infrared.
Apparently, the eyesight of spiders is both odd and complex, and they may indeed see infrared, or, they might be building webs in places that attract insects that can see or sense infrared light. Other creatures see infrared, too. Here some other fun facts about spider, at this link.
By the way, discussing spiders on the Astro Net does have an astronomical connection. Hundreds of years ago, after the invention and first use of the telescope, astronomers (and others who needed optical aid, like gunsight manufacturers) needed a way to make very fine and thin crosshairs for their spotting scopes. Spider silk came to be used for that purpose, to make the crosshairs for reticles.
To close out the Net, Don KA9QJG relayed that Radio Shack might make a comeback, though a recent report places its comeback also in a surprising area. Apparently, the electronics chain store hadn't disappeared entirely, as one can still locate a store, though it might be part of another outlet, like an Ace Hardware store or in a Hobby Town store.
The Astro Net closed with thanks to all check-ins, and, to those who listen to the Net on RadioReference.com. One can also find current and past installments of the Astro Net, not only through postings of recaps at the KA9QJG repeater news group but also at this website. After the Net, Don KA9QJG ran a recent podcast from Tamitha Skov, the Space Weather Woman.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KA9QJG Don
K9SGA Dan
KD9HOK Greg
KD9VBE Randy
KD9VH Dean
KD9WFF Randall
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next Astro Net on Wednesday, September 27, 2023, at 8:00 p.m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
On solar activity:
As with previous Nets, Glenn KD9PNY and Roy KD9RSE outlined recent solar activity that has resulted in some radio disruption, though propagation's ups-and-downs have not been unusual, just spotty.
On comet activity:
Glenn KD9PNY briefed check-ins on the recent discovery of Comet Nishimura, a fast-moving "green" comet (i.e., a comet of apparent green color due to its composition). Viewing the faint comet may be a challenge if the sky is somewhat bright, as it was visible in morning twilight before dawn, but has passed into evening twilight at sunset, at this link.
On planet activity:
Also as in previous Nets, Glenn KD9PNY reported on what one can see of the planets.
On telescope selection:
As with any good attempt to view the night sky, optical aid is necessary. Roy KD9RSE outlined some aspects on selecting that right aid for your own eyes to view the night skies, at this link.
On other items:
Roy KD9RSE reminded check-ins and the listening audience about the total solar eclipse on April 8, 2024 that will be visible through part of the KA9QJG repeater's range. Though it's just over six months away, one may want to prepare for the eclipse with a good location to view it, as roads may be jammed with sky observers and the curious motoring into the area. (By the way, there is another solar eclipse next month, an annular eclipse, but it's not visible live in the Midwest.)
Roy KD9RSE also alerted all to the prospect of seeing an upcoming neat effect with a geochron. (You can download a free geochron at this link and customize it to your QTH.) That is, on the first day of Fall (at the Autumnal Equinox), the greylines on a geochron will appear vertical; neat to see.
The Astro Net then turned into the Arachnid Net, and became all about spiders. That is, Greg KD9HOK commented on-the-air with a live description of a spider building its web across the lens of his QTH's security camera. Other check-ins related their similar observations and all pondered the reason for this preference for security cameras, perhaps due the spider's ability to see various wavelengths, including infrared.
Apparently, the eyesight of spiders is both odd and complex, and they may indeed see infrared, or, they might be building webs in places that attract insects that can see or sense infrared light. Other creatures see infrared, too. Here some other fun facts about spider, at this link.
By the way, discussing spiders on the Astro Net does have an astronomical connection. Hundreds of years ago, after the invention and first use of the telescope, astronomers (and others who needed optical aid, like gunsight manufacturers) needed a way to make very fine and thin crosshairs for their spotting scopes. Spider silk came to be used for that purpose, to make the crosshairs for reticles.
To close out the Net, Don KA9QJG relayed that Radio Shack might make a comeback, though a recent report places its comeback also in a surprising area. Apparently, the electronics chain store hadn't disappeared entirely, as one can still locate a store, though it might be part of another outlet, like an Ace Hardware store or in a Hobby Town store.
The Astro Net closed with thanks to all check-ins, and, to those who listen to the Net on RadioReference.com. One can also find current and past installments of the Astro Net, not only through postings of recaps at the KA9QJG repeater news group but also at this website. After the Net, Don KA9QJG ran a recent podcast from Tamitha Skov, the Space Weather Woman.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KA9QJG Don
K9SGA Dan
KD9HOK Greg
KD9VBE Randy
KD9VH Dean
KD9WFF Randall
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next Astro Net on Wednesday, September 27, 2023, at 8:00 p.m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
Astro Net recap, for August 23, 2023
Highlights from on-the-air ham radio transmission on 147.045 MHz
For the 33rd installment of the Astro Net on 8/23/2023, Roy KD9RSE was unavoidably unavailable this evening; so, Glenn KD9PNY piloted the mother ship solo. Here is a summary of topics that check-ins had the chance to discuss on-the-air.
On solar activity:
As with previous Nets, here is the current status of the Sun, and recent solar activity, that has resulted in some radio disruption.
On planet activity:
Also as in previous Nets, Glenn KD9PNY reported on various planets in the evening and morning skies.
On atmospheric phenomena:
While hams all know solar storms can disrupt radio propagation and communications technology, there are atmospheric phenomena that also disrupt or extend radio propagation. Jim W9JOM explained various such phenomena, descriptions of which are found at this link and this link.
The Astro Net closed with thanks to all check-ins, and, to those who listen to the Net on RadioReference.com. One can also find current and past installments of the Astro Net, not only through postings of recaps at the KA9QJG repeater news group, but also at this website.
Thanks to all who checked in to the Astro Net ~
KD9PNY Glenn
W9JOM Jim
KA9QJG Don
AC9ZY Shawn
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next Astro Net on Wednesday, September 13, 2023, at 8:00 p.m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
On solar activity:
As with previous Nets, here is the current status of the Sun, and recent solar activity, that has resulted in some radio disruption.
On planet activity:
Also as in previous Nets, Glenn KD9PNY reported on various planets in the evening and morning skies.
On atmospheric phenomena:
While hams all know solar storms can disrupt radio propagation and communications technology, there are atmospheric phenomena that also disrupt or extend radio propagation. Jim W9JOM explained various such phenomena, descriptions of which are found at this link and this link.
The Astro Net closed with thanks to all check-ins, and, to those who listen to the Net on RadioReference.com. One can also find current and past installments of the Astro Net, not only through postings of recaps at the KA9QJG repeater news group, but also at this website.
Thanks to all who checked in to the Astro Net ~
KD9PNY Glenn
W9JOM Jim
KA9QJG Don
AC9ZY Shawn
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next Astro Net on Wednesday, September 13, 2023, at 8:00 p.m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
Astro Net recap, for August 9, 2023
Highlights from on-the-air ham radio transmission on 147.045 MHz
For the 32nd installment of the Astro Net on 8/9/2023, here is a summary (not a transcript) of various topics that check-ins had the chance to discuss on-the-air.
On solar activity:
As with previous Nets, Glenn KD9PNY and Roy KD9RSE alerted listeners to the current status of the Sun, and recent solar activity, that resulted in some radio disruption, perhaps with pending auroras. That is, while solar storms can play havoc with radio propagation, they can also cause auroras. With solar activity in recent days, Mark KC9CHS claimed to have observed a pre-dawn aurora this past week.
On planet activity:
Also as in previous Nets, Glenn KD9PNY and Roy KD9RSE reported on various planets in the evening and morning skies. As in previous Nets, before local sunup look for ringed Saturn in the southern sky and bright Jupiter in the eastern sky above the horizon.
On things to see
This month one can look for several celestial wonders. On or about August 11-12 every year, the Perseid meteor shower makes an appearance. Names for meteor showers derive from the name of the constellation out of which meteors appear to radiate; so, as seen from Earth, the Perseids (PURR-see-ids) seem to originate.
Such showers are the the result of Earth's passage through a field of dusty debris left in the wake of a passing comet that crosses the orbit of Earth around the Sun. (The source for the annual Perseid meteor shower is Comet Swift-Tuttle.) That debris hits Earth's upper atmosphere at high speed (several miles per second); the debris (perhaps the size of dust motes up to that of a rice grain) collides with air, heats up by friction, but also ionizes the air due to the debris' high speed of entry. A trail of ionized gas results. It's that glowing streak of the meteor's ionized trail (aka the "shooting star") that we see blazing across the night sky. Away from city lights and after midnight in a clear pre-dawn sky will be the best advantages to view the Perseids (at this link).
Roy KD9RSE alerted listeners to the prospect that if one is outside before sunup this Autumn under a clear sky away from modern lighting, one might chance to witness a phenomenon, eerie in appearance, known as the zodiacal light, aka the "false dawn". A wedge of light that appears before sunrise in Fall (or after sunset in Spring, aka the "false dusk"), the zodiacal light is our view of all that meteor dust and debris in the plane of Earth's orbit.
High in the sky in summertime stretches the Milky Way from horizon to horizon; when looking at it you're seeing out through the very edge of our home galaxy, called the Milky Way. Embedded within it are nebulas, clouds of gas lit by stars, all of which can be viewed with a good, steady binocular. At this link is a detailed guide.
To see these celestial wonders well, it's also good to give time for the eyes to adapt to the dark. Glenn KD9PNY described how one can work up to good "night vision" and take in the nighttime sights. His viewing tips for good night vision and how eyes work at night are found at this link.
In terms of viewing with "night vision" devices, that's a different matter, though an relatively inexpensive IR viewer might make for in interesting holiday gift. Roy KD9RSE described the use of an infrared viewer versus tactical IR gear and how they work; that is, some tactical gear as true night-vision items are thermal imaging devices whereas an IR viewer may more often be a light-amplifier device.
In areas away from city lights, dark-adapted eyes can reveal a wealth of detail in the night sky. Modern outdoor illumination may convey some feeling of safety, such as from streetlights, or provide advertising information, such as from digital billboards; but, that extra light has washed out the awe of the night sky. Despite the lighting of modern urban society, there are still things to be seen with unclothed eyes.
If one wants more than just naked-eye astronomy, there are telescopes to buy or to build, either very cheaply or more detailed if you want a lens telescope, or, with a good deal of patience, if you want a mirror telescope. Build it as you need it, whatever may suit your fancy and budget. Whichever telescope you may try to make, you can decide which is better for you.
On other items:
Don KA9QJG played a recording he prepared from a newspaper article put out by the New York Times in 1940, about a great solar storm, posted to the news group and seen at this link. (By the way, apparently there was another such storm in 1921, and a worse one in 1859.)
A point of contention about the article at that Spacweather.com link (just above) is its conclusion that modern communications would remain relatively unaffected by a powerful solar storm. Most check-ins who voiced an opinion disagreed with the article's conclusion, knowing first-hand how disruptive solar storms can be to radio propagation and communications technology.
Thoughts and prayers go out to the spouse of Don KA9QJG, his wife Betty, who will have surgery at some time soon.
The Astro Net closed with thanks to all check-ins, and, to those who listen to the Net on RadioReference.com. One can also find current and past installments of the Astro Net, not only through postings of recaps at the KA9QJG repeater news group, but also at this website.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KD9VBE Randy
K9JON Ron
KC9EQJ Joe
K9SGA Dan
KA9QJG Don
KC9CHS Mark
W9SRV Tom (post-Net check-in)
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next Astro Net on Wednesday, August 23, 2023, at 8:00 p.m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
On solar activity:
As with previous Nets, Glenn KD9PNY and Roy KD9RSE alerted listeners to the current status of the Sun, and recent solar activity, that resulted in some radio disruption, perhaps with pending auroras. That is, while solar storms can play havoc with radio propagation, they can also cause auroras. With solar activity in recent days, Mark KC9CHS claimed to have observed a pre-dawn aurora this past week.
On planet activity:
Also as in previous Nets, Glenn KD9PNY and Roy KD9RSE reported on various planets in the evening and morning skies. As in previous Nets, before local sunup look for ringed Saturn in the southern sky and bright Jupiter in the eastern sky above the horizon.
On things to see
This month one can look for several celestial wonders. On or about August 11-12 every year, the Perseid meteor shower makes an appearance. Names for meteor showers derive from the name of the constellation out of which meteors appear to radiate; so, as seen from Earth, the Perseids (PURR-see-ids) seem to originate.
Such showers are the the result of Earth's passage through a field of dusty debris left in the wake of a passing comet that crosses the orbit of Earth around the Sun. (The source for the annual Perseid meteor shower is Comet Swift-Tuttle.) That debris hits Earth's upper atmosphere at high speed (several miles per second); the debris (perhaps the size of dust motes up to that of a rice grain) collides with air, heats up by friction, but also ionizes the air due to the debris' high speed of entry. A trail of ionized gas results. It's that glowing streak of the meteor's ionized trail (aka the "shooting star") that we see blazing across the night sky. Away from city lights and after midnight in a clear pre-dawn sky will be the best advantages to view the Perseids (at this link).
Roy KD9RSE alerted listeners to the prospect that if one is outside before sunup this Autumn under a clear sky away from modern lighting, one might chance to witness a phenomenon, eerie in appearance, known as the zodiacal light, aka the "false dawn". A wedge of light that appears before sunrise in Fall (or after sunset in Spring, aka the "false dusk"), the zodiacal light is our view of all that meteor dust and debris in the plane of Earth's orbit.
High in the sky in summertime stretches the Milky Way from horizon to horizon; when looking at it you're seeing out through the very edge of our home galaxy, called the Milky Way. Embedded within it are nebulas, clouds of gas lit by stars, all of which can be viewed with a good, steady binocular. At this link is a detailed guide.
To see these celestial wonders well, it's also good to give time for the eyes to adapt to the dark. Glenn KD9PNY described how one can work up to good "night vision" and take in the nighttime sights. His viewing tips for good night vision and how eyes work at night are found at this link.
In terms of viewing with "night vision" devices, that's a different matter, though an relatively inexpensive IR viewer might make for in interesting holiday gift. Roy KD9RSE described the use of an infrared viewer versus tactical IR gear and how they work; that is, some tactical gear as true night-vision items are thermal imaging devices whereas an IR viewer may more often be a light-amplifier device.
In areas away from city lights, dark-adapted eyes can reveal a wealth of detail in the night sky. Modern outdoor illumination may convey some feeling of safety, such as from streetlights, or provide advertising information, such as from digital billboards; but, that extra light has washed out the awe of the night sky. Despite the lighting of modern urban society, there are still things to be seen with unclothed eyes.
If one wants more than just naked-eye astronomy, there are telescopes to buy or to build, either very cheaply or more detailed if you want a lens telescope, or, with a good deal of patience, if you want a mirror telescope. Build it as you need it, whatever may suit your fancy and budget. Whichever telescope you may try to make, you can decide which is better for you.
On other items:
Don KA9QJG played a recording he prepared from a newspaper article put out by the New York Times in 1940, about a great solar storm, posted to the news group and seen at this link. (By the way, apparently there was another such storm in 1921, and a worse one in 1859.)
A point of contention about the article at that Spacweather.com link (just above) is its conclusion that modern communications would remain relatively unaffected by a powerful solar storm. Most check-ins who voiced an opinion disagreed with the article's conclusion, knowing first-hand how disruptive solar storms can be to radio propagation and communications technology.
Thoughts and prayers go out to the spouse of Don KA9QJG, his wife Betty, who will have surgery at some time soon.
The Astro Net closed with thanks to all check-ins, and, to those who listen to the Net on RadioReference.com. One can also find current and past installments of the Astro Net, not only through postings of recaps at the KA9QJG repeater news group, but also at this website.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KD9VBE Randy
K9JON Ron
KC9EQJ Joe
K9SGA Dan
KA9QJG Don
KC9CHS Mark
W9SRV Tom (post-Net check-in)
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next Astro Net on Wednesday, August 23, 2023, at 8:00 p.m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
Astro Net recap, for July 26, 2023
Highlights from on-the-air ham radio transmission on 147.045 MHz
For the 31th installment of the Astro Net on 7/26/2023, here is a summary (not a transcript) of various topics that check-ins had the chance to discuss on-the-air.
On solar activity:
While Astro Net co-host Glenn KD9PNY had to work late on this date and was unavailable for the Net, Roy KD9RSE alerted listeners to the current status of the Sun, with a recent geomagnetic storm and some radio disruption; perhaps pending auroras (but not likely visible in the KA9QJG repeater area). That is, a big solar storm is headed our way, which is forecast at this link. While solar storms can play havoc with radio propagation, they can also cause auroras. At present, solar activity appears to suggest that auroras may be possible for direct observation, but likely only to very far north.
Posted previously in these Nets, while various weather factors (affecting either HF and VHF/UHF) are always a distinct possibility to affect propagation, Roy KD9RSE summarized solar activity in Cycle 25 today and how it compares (so far) to the previous Cycle 24. It may be that Cycle 25 may exceed the activity of Cycle 24; time will tell.
On planet activity:
Roy KD9RSE reported on various planets in the evening and morning skies. As in previous Nets, before local sunup look for ringed Saturn in the southern sky and bright Jupiter in the eastern sky above the horizon.
On other items:
Don KA9QJG aired a recent video podcast by Dr. Tamitha Skov, the (excitable and loquacious) Space Weather Woman.
Thoughts and prayers go out to the spouse of Don KA9QJG, his wife Betty, who was recently hospitalized. May her path forward lead her to good health and full recovery.
The Astro Net closed with thanks to all check-ins, and, to those who listen to the Net on RadioReference.com. One can also find current and past installments of the Astro Net, not only through postings of recaps at the KA9QJG repeater news group, but also at this website.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KA9QJG Don
KD9VBE Randy
KD9WTJ Sarah
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next Astro Net on Wednesday, August 9, 2023, at 8:00 p.m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
On solar activity:
While Astro Net co-host Glenn KD9PNY had to work late on this date and was unavailable for the Net, Roy KD9RSE alerted listeners to the current status of the Sun, with a recent geomagnetic storm and some radio disruption; perhaps pending auroras (but not likely visible in the KA9QJG repeater area). That is, a big solar storm is headed our way, which is forecast at this link. While solar storms can play havoc with radio propagation, they can also cause auroras. At present, solar activity appears to suggest that auroras may be possible for direct observation, but likely only to very far north.
Posted previously in these Nets, while various weather factors (affecting either HF and VHF/UHF) are always a distinct possibility to affect propagation, Roy KD9RSE summarized solar activity in Cycle 25 today and how it compares (so far) to the previous Cycle 24. It may be that Cycle 25 may exceed the activity of Cycle 24; time will tell.
On planet activity:
Roy KD9RSE reported on various planets in the evening and morning skies. As in previous Nets, before local sunup look for ringed Saturn in the southern sky and bright Jupiter in the eastern sky above the horizon.
On other items:
Don KA9QJG aired a recent video podcast by Dr. Tamitha Skov, the (excitable and loquacious) Space Weather Woman.
Thoughts and prayers go out to the spouse of Don KA9QJG, his wife Betty, who was recently hospitalized. May her path forward lead her to good health and full recovery.
The Astro Net closed with thanks to all check-ins, and, to those who listen to the Net on RadioReference.com. One can also find current and past installments of the Astro Net, not only through postings of recaps at the KA9QJG repeater news group, but also at this website.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KA9QJG Don
KD9VBE Randy
KD9WTJ Sarah
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next Astro Net on Wednesday, August 9, 2023, at 8:00 p.m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
Astro Net recap, for July 12, 2023
Highlights from on-the-air ham radio transmission on 147.045 MHz
For the 30th installment of the Astro Net on 7/12/2023, here is a summary (not a transcript) of various topics that check-ins had the chance to discuss on-the-air.
On planet activity:
Over the past several Nets, Glenn KD9PNY and Roy KD9RSE have reported on the position and visibility of various planets in the evening and morning skies. Like last time, look for brilliant Venus in the western sky after sunset, but paired with Mars and Regulus; once again, like last time, before local sunup look for ringed Saturn in the southern sky and bright Jupiter in the eastern sky above the horizon.
On solar activity:
Glenn KD9PNY alerted listeners to the current status of the Sun, with its recent flares and some radio disruption but no real evidence (at this time) of pending auroras; however, in the coming days, there may be the possibility of a large solar storm, perhaps a CME, headed our way, which is forecast at this link. For live looks at the Sun, one can also view this link, showing our same Sun as seen through different wavelengths.
While weather factors (affecting either HF and VHF/UHF) will always be a distinct possibility to affect propagation, Roy KD9RSE summarized how solar activity (as shown by its indices) has its part to play. A description of these indices and how they’re interpreted is found at this link; a more detailed discussion is found at this link. (These links have been posted previously in these Nets.)
On other items:
The Astro Net welcomed Tim K9QKE, from Valparaiso, IN, who checked in with a strong signal.
Glenn KD9PNY offered a tribute to Gene Kranz, former flight director for NASA's Mercury, Gemini, and Apollo programs, who wrote the book "Failure Is Not a Option" and who was portrayed wearing his characteristic white vest in the movie Apollo 13.
Randy KD9VBE reported that the Stellarium astronomy program indicated that a string of Starlink satellites were to be seen during the Astro Net, if weather permitted. Indeed, as the season draws on, Roy KD9RSE reminded listeners that satellites are best seen after sunset in late Spring and during Summer (for the Northern Hemisphere), when the angle of Summer sunlight shows their locations overhead in orbit.
While solar storms can play havoc with radio propagation, they can also cause auroras. Tim K9QKE recounted his own sighting of an aurora, with its characteristic appearance of a rippling drapery, which appeared green and magenta.
Dave KD9SDU wondered whether solar activity played a role during his recent POTA activation along the Kankakee River, from where he was able to receive signals from stations relatively nearby. While surprising, it may seem unusual. Though the occurrence of close-by signals can arise several ways, Roy KD9RSE suggested tropospheric ducting might contribute, though ducting is thought to extend (not shorten) the reach of radio signals. It may also be the possibility that air dense enough (perhaps due to high air pressure) between nearby stations might reflect well the radio waves between those close-by stations.
Don KA9QJG asked about the reliability of radio-propagation forecasts. For example, solar activity might affect radio propagation, and, might suggest band closures, while operators may experience none of the anticipated closures. Roy KD9RSE suggested that forecasts are only as good (i.e., accurate and precise) as the models allows or the forecaster's interpretation; that is, one may need to consult a variety of sources to get consistent and reliable results. That's the same with all sources, whether for scientific work or popular consumption. And if the source has its own bias, then accuracy and precision from that source ought to be suspect.
With the inclement weather that raced through the repeater area during the Astro Net, Don KA9QJG took the occasion to address to check-ins and listeners with the opportunity to become accurate and precise weather spotters, if they so choose to do so; but, also, they must learn the lingo, such as the correct codes for conveying weather conditions that radar may not detect near ground level. In times of bad weather, amateur radio operators and many professions of course must have their emergency plans; for example, when setting up an outdoor venue for concerts, Steve N9IQ detailed how a stage crew must work to batten down that stage venue if severe weather approaches.
The Astro Net closed with thanks to all new and returning check-ins, and, to those who listen to the Net on RadioReference.com. One can also find current and past installments of the Astro Net, not only through postings of recaps at the KA9QJG repeater news group, but also at this website.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KD9VBE Randy
KA9QJG Don
W9ABN Ed
K9QKE Tim
KD9SDU Dave
KD9IQU Nick
N9IQ Steve
KD9HOK Greg
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next Astro Net on Wednesday, July 26, 2023, at 8:00 p.m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
On planet activity:
Over the past several Nets, Glenn KD9PNY and Roy KD9RSE have reported on the position and visibility of various planets in the evening and morning skies. Like last time, look for brilliant Venus in the western sky after sunset, but paired with Mars and Regulus; once again, like last time, before local sunup look for ringed Saturn in the southern sky and bright Jupiter in the eastern sky above the horizon.
On solar activity:
Glenn KD9PNY alerted listeners to the current status of the Sun, with its recent flares and some radio disruption but no real evidence (at this time) of pending auroras; however, in the coming days, there may be the possibility of a large solar storm, perhaps a CME, headed our way, which is forecast at this link. For live looks at the Sun, one can also view this link, showing our same Sun as seen through different wavelengths.
While weather factors (affecting either HF and VHF/UHF) will always be a distinct possibility to affect propagation, Roy KD9RSE summarized how solar activity (as shown by its indices) has its part to play. A description of these indices and how they’re interpreted is found at this link; a more detailed discussion is found at this link. (These links have been posted previously in these Nets.)
On other items:
The Astro Net welcomed Tim K9QKE, from Valparaiso, IN, who checked in with a strong signal.
Glenn KD9PNY offered a tribute to Gene Kranz, former flight director for NASA's Mercury, Gemini, and Apollo programs, who wrote the book "Failure Is Not a Option" and who was portrayed wearing his characteristic white vest in the movie Apollo 13.
Randy KD9VBE reported that the Stellarium astronomy program indicated that a string of Starlink satellites were to be seen during the Astro Net, if weather permitted. Indeed, as the season draws on, Roy KD9RSE reminded listeners that satellites are best seen after sunset in late Spring and during Summer (for the Northern Hemisphere), when the angle of Summer sunlight shows their locations overhead in orbit.
While solar storms can play havoc with radio propagation, they can also cause auroras. Tim K9QKE recounted his own sighting of an aurora, with its characteristic appearance of a rippling drapery, which appeared green and magenta.
Dave KD9SDU wondered whether solar activity played a role during his recent POTA activation along the Kankakee River, from where he was able to receive signals from stations relatively nearby. While surprising, it may seem unusual. Though the occurrence of close-by signals can arise several ways, Roy KD9RSE suggested tropospheric ducting might contribute, though ducting is thought to extend (not shorten) the reach of radio signals. It may also be the possibility that air dense enough (perhaps due to high air pressure) between nearby stations might reflect well the radio waves between those close-by stations.
Don KA9QJG asked about the reliability of radio-propagation forecasts. For example, solar activity might affect radio propagation, and, might suggest band closures, while operators may experience none of the anticipated closures. Roy KD9RSE suggested that forecasts are only as good (i.e., accurate and precise) as the models allows or the forecaster's interpretation; that is, one may need to consult a variety of sources to get consistent and reliable results. That's the same with all sources, whether for scientific work or popular consumption. And if the source has its own bias, then accuracy and precision from that source ought to be suspect.
With the inclement weather that raced through the repeater area during the Astro Net, Don KA9QJG took the occasion to address to check-ins and listeners with the opportunity to become accurate and precise weather spotters, if they so choose to do so; but, also, they must learn the lingo, such as the correct codes for conveying weather conditions that radar may not detect near ground level. In times of bad weather, amateur radio operators and many professions of course must have their emergency plans; for example, when setting up an outdoor venue for concerts, Steve N9IQ detailed how a stage crew must work to batten down that stage venue if severe weather approaches.
The Astro Net closed with thanks to all new and returning check-ins, and, to those who listen to the Net on RadioReference.com. One can also find current and past installments of the Astro Net, not only through postings of recaps at the KA9QJG repeater news group, but also at this website.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KD9VBE Randy
KA9QJG Don
W9ABN Ed
K9QKE Tim
KD9SDU Dave
KD9IQU Nick
N9IQ Steve
KD9HOK Greg
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next Astro Net on Wednesday, July 26, 2023, at 8:00 p.m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
Astro Net recap, for June 28, 2023
Highlights from on-the-air ham radio transmission on 147.045 MHz
For the 29th installment of the Astro Net on 6/28/2023, here is a summary (not a transcript) of various topics that check-ins had the chance to discuss on-the-air.
On seeing the sky:
As in previous Nets, there was again some discussion about the effect of smoke from fires in Canada and the western USA. Glenn KD9RSE provided a website that allows one to check air quality by one's QTH by ZIP Code, at this link. Roy KD9RSE provided an additional link, here, that shows the locations of active fires across Canada and the USA, which are likely sources of the current smoke mixed in with the usual summertime humidity.
Of course, haze caused by the smoke and the smoke itself can dim starlight and obscure the planets and the Moon. The haze absorbs various wavelengths in the visible light range of the spectrum. So the Moon, too, can appear orange, due to excess smoke, dust, pollution, and humidity obscuring celestial objects in the sky.
As radio waves are part of that spectrum, they, too, are affected (by absorption, refraction, or attenuation) due to various atmospheric conditions such as fog, mist, rain, and snow and due to aerosols. As these conditions change and aerosols move around, so, too, can these changes and movements affect radio propagation.
In addition, one small advantage of smoky air is its relative atmospheric stability, the characteristics of which trap particles of smoke and pollution and may improve somewhat the "seeing" of night-sky objects (that is, to take small advantage of the effect of air turbulence on viewing objects through a telescope).
On planet activity:
Over the past several Nets, Glenn KD9PNY and Roy KD9RSE have reported on the position and visibility of various planets in the evening and morning skies. Look for brilliant Venus in the western sky after sunset; look for ringed Saturn and bright Jupiter in the eastern sky above the horizon before dawn.
On solar activity:
While weather factors (affecting either HF and VHF/UHF) will always be a distinct possibility to affect propagation, solar activity (as shown by its indices) has its part to play. A description of these indices and how they’re interpreted is found at this link; a more detailed discussion is found at this link. (These links have been posted previously in these Nets.)
Glenn KD9PNY alerted listeners to the current quietude of the Sun; however, in the coming weeks, there may be the possibility of solar storms, which are forecast at this link. For live looks at the Sun, one can also view this link, showing our same Sun as seen through different wavelengths.
On other items:
As the seasons shift, observers can know what will be seen in the night next season by viewing a clear sky now before dawn. At this link is a detailed explanation of why stars and constellations shift with the seasons. At this link is a shorter, more visual explanation.
As Glenn KD9PNY reports that on leaving for work in morning twilight and returning by evening twilight, he notes the location of the Summer Triangle, composed of a combo of stars, namely, Deneb in Cygnus (the Swan), Altair in Aquila (the Eagle), and Vega in Lyra (the Harp). These stars form a well-known asterism that helps one to find at least three good summertime star patterns.
Some well-known patterns also form the more popular constellations of the Zodiac; however, the actual swath of sky represented by the Zodiac may contain more than the customary twelve constellations; that is, there may be 14 patterns that could be included (depending on how one counts constellations fully within or slightly grazing the Zodiac sky).
While we can enjoy a repeat of constellations every season, it has been the habit of peoples around the world and across time to have their own interpretations of the night sky. Patterns of stars have fired the imaginations of ancient and modern peoples, for example, here and here, who have sought to find solace, meaning, and even entertainment in viewing the night sky.
The Astro Net welcomed Ryan KC9SIT, from DeMotte, IN, who checked in with a strong signal.
Don KA9QJG and Greg KD9HOK offered condolences and memories of a recent silent key, Dan KC9ACU. (A note of his passing was posted earlier to the news group.) Glenn KD9PNY held an on-air moment of silence out of respect for the SK's memory.
The Astro Net closed with thanks to all new and returning check-ins, and, to those who listen to the Net on RadioReference.com. One can also find current and past installments of the Astro Net, not only through postings of recaps at the KA9QJG repeater news group, but also at this website.
Addendum: Don KA9QJG ran a past ARRL podcast. In the podcast, there was mention of the Amateur Radio Maidenhead Grid Square, for which one can use this link to find one's grid-square designation, using callsign, city, state, or ZIP Code.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KD9IQU Nick
W9ABN Ed
KA9QJG Don
KC9SIT Ryan
N9IQ Steve
KD9QGP Dustin
KD9HOK Greg
AC9ZY Shawn (post-Net check-in)
KD9EJE Shad (post-Net check-in)
KD9VBE Randy (post-Net check-in)
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next Astro Net on Wednesday, July 12, 2023, at 8:00 p.m. In the interim, Happy Independence Day to all!
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
On seeing the sky:
As in previous Nets, there was again some discussion about the effect of smoke from fires in Canada and the western USA. Glenn KD9RSE provided a website that allows one to check air quality by one's QTH by ZIP Code, at this link. Roy KD9RSE provided an additional link, here, that shows the locations of active fires across Canada and the USA, which are likely sources of the current smoke mixed in with the usual summertime humidity.
Of course, haze caused by the smoke and the smoke itself can dim starlight and obscure the planets and the Moon. The haze absorbs various wavelengths in the visible light range of the spectrum. So the Moon, too, can appear orange, due to excess smoke, dust, pollution, and humidity obscuring celestial objects in the sky.
As radio waves are part of that spectrum, they, too, are affected (by absorption, refraction, or attenuation) due to various atmospheric conditions such as fog, mist, rain, and snow and due to aerosols. As these conditions change and aerosols move around, so, too, can these changes and movements affect radio propagation.
In addition, one small advantage of smoky air is its relative atmospheric stability, the characteristics of which trap particles of smoke and pollution and may improve somewhat the "seeing" of night-sky objects (that is, to take small advantage of the effect of air turbulence on viewing objects through a telescope).
On planet activity:
Over the past several Nets, Glenn KD9PNY and Roy KD9RSE have reported on the position and visibility of various planets in the evening and morning skies. Look for brilliant Venus in the western sky after sunset; look for ringed Saturn and bright Jupiter in the eastern sky above the horizon before dawn.
On solar activity:
While weather factors (affecting either HF and VHF/UHF) will always be a distinct possibility to affect propagation, solar activity (as shown by its indices) has its part to play. A description of these indices and how they’re interpreted is found at this link; a more detailed discussion is found at this link. (These links have been posted previously in these Nets.)
Glenn KD9PNY alerted listeners to the current quietude of the Sun; however, in the coming weeks, there may be the possibility of solar storms, which are forecast at this link. For live looks at the Sun, one can also view this link, showing our same Sun as seen through different wavelengths.
On other items:
As the seasons shift, observers can know what will be seen in the night next season by viewing a clear sky now before dawn. At this link is a detailed explanation of why stars and constellations shift with the seasons. At this link is a shorter, more visual explanation.
As Glenn KD9PNY reports that on leaving for work in morning twilight and returning by evening twilight, he notes the location of the Summer Triangle, composed of a combo of stars, namely, Deneb in Cygnus (the Swan), Altair in Aquila (the Eagle), and Vega in Lyra (the Harp). These stars form a well-known asterism that helps one to find at least three good summertime star patterns.
Some well-known patterns also form the more popular constellations of the Zodiac; however, the actual swath of sky represented by the Zodiac may contain more than the customary twelve constellations; that is, there may be 14 patterns that could be included (depending on how one counts constellations fully within or slightly grazing the Zodiac sky).
While we can enjoy a repeat of constellations every season, it has been the habit of peoples around the world and across time to have their own interpretations of the night sky. Patterns of stars have fired the imaginations of ancient and modern peoples, for example, here and here, who have sought to find solace, meaning, and even entertainment in viewing the night sky.
The Astro Net welcomed Ryan KC9SIT, from DeMotte, IN, who checked in with a strong signal.
Don KA9QJG and Greg KD9HOK offered condolences and memories of a recent silent key, Dan KC9ACU. (A note of his passing was posted earlier to the news group.) Glenn KD9PNY held an on-air moment of silence out of respect for the SK's memory.
The Astro Net closed with thanks to all new and returning check-ins, and, to those who listen to the Net on RadioReference.com. One can also find current and past installments of the Astro Net, not only through postings of recaps at the KA9QJG repeater news group, but also at this website.
Addendum: Don KA9QJG ran a past ARRL podcast. In the podcast, there was mention of the Amateur Radio Maidenhead Grid Square, for which one can use this link to find one's grid-square designation, using callsign, city, state, or ZIP Code.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KD9IQU Nick
W9ABN Ed
KA9QJG Don
KC9SIT Ryan
N9IQ Steve
KD9QGP Dustin
KD9HOK Greg
AC9ZY Shawn (post-Net check-in)
KD9EJE Shad (post-Net check-in)
KD9VBE Randy (post-Net check-in)
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next Astro Net on Wednesday, July 12, 2023, at 8:00 p.m. In the interim, Happy Independence Day to all!
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
Astro Net recap, for June 21, 2023
Highlights from on-the-air ham radio transmission on 147.045 MHz
For the 28th installment of the Astro Net on 6/21/2023, this for tonight was an unscheduled and spontaneous Net, nicknamed the "Gaze-at-the-Sun" Astro Net, as most topics would likely involve solar activity on this first day of Summer, since an X-class flare had erupted and a CME was predicted to arrive by the following day.
Here is a summary (not a transcript) of various topics that check-ins had the chance to discuss on-the-air.
On solar activity:
Similar to the start of previous Nets, Roy KD9RSE alerted check-ins and listeners on conditions for unfavorable for radio propagation (as of this posting). Band conditions have been up-and-down on certain bands in recent weeks, depending on the level of SFI and the status of the K and A indices, the Kp and Ap indices, and (of course) local weather factors.
As mentioned in the previous Nets, while weather factors (affecting either HF and VHF/UHF) will always be a distinct possibility to affect propagation, solar activity (as shown by its indices) has its part to play. A description of these indices and how they’re interpreted is found at this link; a more detailed discussion is found at this link.
About upcoming celestial attractions, Roy KD9RSE reminded listeners on the prospects for ham radio operators to view the solar eclipse next Spring on April 8, 2024, which will pass through the range of the KA9QJG repeater listening area. Plan now to pick your place along the path of totality, as traffic and accommodations will be jammed well before the time and date of the eclipse.
By the way, to see what happens during an eclipse, at this link is unedited video footage taken with a GoPro camera during the last solar eclipse, which occurred on August 17, 2017. Several of us met in West Frankfort (in southern Illinois) to set up telescopes, watch the eclipse safely (through solar filters), and take plenty of pix. The video doesn't show the eclipse itself, but shows us watching the eclipse. Bloody hot and stifling humid that day; the local radio station played country tunes about the Sun.
It's a 12-minute video, but the actual moments of darkness start at time 3:45 and end by time 6:10. Eclipses only last mere minutes, since Earth and Moon are always on the move; the shadow of the Moon races across the surface of Earth at about 2,000 mph! But one can see how dark it can get, like a big knob turning down the light of day, while all around us the horizon stays bright. Above us, planets can be seen. For those few minutes, we see the eclipse of the Sun within the shadow cast by the Moon!
On other items:
Smoke from fires in Canada, or any measure of polluted air, can dim starlight and obscure the planets and even the Moon. That kind of haze absorbs various wavelengths in the visible light range of the spectrum; so, that haze can keep the atmosphere fairly steady, allowing one to gaze at planets through a binocular or telescope without lots of twinkling, or, along with the angle at which you view it, can make the Moon appear orange at its rising.
Don KA9QJG fretted about the latest news on the troubled Titan submersible (operated by the company called OceanGate). As of this posting, prospects appear grim for its rescue, due to a variety of factors, including an inexact location for the vessel, design of the submersible, its actual depth, and the extraordinary level of effort needed to carry out a successful deep-water retrieval.
Whether CW could be used by those on board the Titan to send distress messages through the ocean was discussed. It is uncertain if Morse code signals might even be heard through a two-mile depth of ocean water, even though undersea layers of water, depending on temperature and salinity, can sometimes act as good conduits for sound waves. (A highly technical discussion of ocean water as a medium for sound propagation is presented at this link.)
Don KA9QJG aired the latest available podcast from Dr. Tamith Skov, the Space Weather Woman.
This impromptu Astro Net closed with thanks to those checked in and those who listen to the Net on RadioReference.com.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9VBE Randy
KA9QJG Don
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next Astro Net on Wednesday, June 28, 2023, at 8:00 p.m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
Here is a summary (not a transcript) of various topics that check-ins had the chance to discuss on-the-air.
On solar activity:
Similar to the start of previous Nets, Roy KD9RSE alerted check-ins and listeners on conditions for unfavorable for radio propagation (as of this posting). Band conditions have been up-and-down on certain bands in recent weeks, depending on the level of SFI and the status of the K and A indices, the Kp and Ap indices, and (of course) local weather factors.
As mentioned in the previous Nets, while weather factors (affecting either HF and VHF/UHF) will always be a distinct possibility to affect propagation, solar activity (as shown by its indices) has its part to play. A description of these indices and how they’re interpreted is found at this link; a more detailed discussion is found at this link.
About upcoming celestial attractions, Roy KD9RSE reminded listeners on the prospects for ham radio operators to view the solar eclipse next Spring on April 8, 2024, which will pass through the range of the KA9QJG repeater listening area. Plan now to pick your place along the path of totality, as traffic and accommodations will be jammed well before the time and date of the eclipse.
By the way, to see what happens during an eclipse, at this link is unedited video footage taken with a GoPro camera during the last solar eclipse, which occurred on August 17, 2017. Several of us met in West Frankfort (in southern Illinois) to set up telescopes, watch the eclipse safely (through solar filters), and take plenty of pix. The video doesn't show the eclipse itself, but shows us watching the eclipse. Bloody hot and stifling humid that day; the local radio station played country tunes about the Sun.
It's a 12-minute video, but the actual moments of darkness start at time 3:45 and end by time 6:10. Eclipses only last mere minutes, since Earth and Moon are always on the move; the shadow of the Moon races across the surface of Earth at about 2,000 mph! But one can see how dark it can get, like a big knob turning down the light of day, while all around us the horizon stays bright. Above us, planets can be seen. For those few minutes, we see the eclipse of the Sun within the shadow cast by the Moon!
On other items:
Smoke from fires in Canada, or any measure of polluted air, can dim starlight and obscure the planets and even the Moon. That kind of haze absorbs various wavelengths in the visible light range of the spectrum; so, that haze can keep the atmosphere fairly steady, allowing one to gaze at planets through a binocular or telescope without lots of twinkling, or, along with the angle at which you view it, can make the Moon appear orange at its rising.
Don KA9QJG fretted about the latest news on the troubled Titan submersible (operated by the company called OceanGate). As of this posting, prospects appear grim for its rescue, due to a variety of factors, including an inexact location for the vessel, design of the submersible, its actual depth, and the extraordinary level of effort needed to carry out a successful deep-water retrieval.
Whether CW could be used by those on board the Titan to send distress messages through the ocean was discussed. It is uncertain if Morse code signals might even be heard through a two-mile depth of ocean water, even though undersea layers of water, depending on temperature and salinity, can sometimes act as good conduits for sound waves. (A highly technical discussion of ocean water as a medium for sound propagation is presented at this link.)
Don KA9QJG aired the latest available podcast from Dr. Tamith Skov, the Space Weather Woman.
This impromptu Astro Net closed with thanks to those checked in and those who listen to the Net on RadioReference.com.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9VBE Randy
KA9QJG Don
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next Astro Net on Wednesday, June 28, 2023, at 8:00 p.m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
Astro Net recap, for June 14, 2023
Highlights from on-the-air ham radio transmission on 147.045 MHz
For the 27th installment of the Astro Net on 6/14/2023, here is a summary (not a transcript) of various topics that check-ins had the chance to discuss on-the-air.
On planet activity:
Over the past several Nets, Glenn KD9PNY and Roy KD9RSE have reported on the position and visibility of various planets in the evening and morning skies. Brilliant Venus still gleams brightly in the early evening sky for the rest of June. Like last month, Mars continues to show a pale orange color in the night sky, setting about 20 minutes after Venus, just before midnight. By month's end, both planets will appear close together, about 3.5 degrees apart (of angular measure).
In astronomical terms, that close appearance in the sky is called an appulse. By contrast, a conjunction is a closer apparition, where both planets occupy the same meridian of celestial longitude, or, almost appear to touch in the sky, but are really far apart in outer space. (At this link is the difference between the two terms, appulse versus conjunction.) And there are several good conjunctions coming up in the coming weeks, at this link.
In the meantime, pale yellow Saturn rises well ahead of the Sun in pre-dawn twilight, followed by bright-white Jupiter, above the horizon before dawn.
On solar activity:
Similar to the start of previous Nets, Roy KD9RSE and Glenn KD9PNY updated check-ins and listeners on conditions that still seem occasionally unfavorable for radio propagation (as of this posting). Band conditions have been up-and-down on certain bands, depending on the level of SFI and the status of the K and A indices and (of course) weather factors. Some bands have opened well on HF, while VHF/UHF signals have been plagued by intermittent static.
While weather factors (affecting either HF and VHF/UHF) will always be a distinct possibility to affect propagation, solar activity (as shown by its indices) has its part to play. A description of these indices and how they’re interpreted is found at this link; a more detailed discussion is found at this link.
Glenn KD9PNY alerted listeners to recent bursts from the Sun; a live look is found at this link, with the same Sun as seen through different wavelengths.
Roy KD9RSE followed up with ways to observe the Sun safely, including various filters for telescopes or actual solar scopes. (But never use a solar filter fitted onto an eyepiece; they heat up and break in focused sunlight.)
On lunar activity:
Glenn KD9PNY alerted listeners that the Moon, just before New Moon as a waning crescent or just after New Moon as a waxing crescent, may often show a phenomenon known as earthshine. At this link, earthshine is Earth's own brightness lit by the Sun reflected off the ball of the Moon not lit by the Sun at the Moon's crescent phases. So, while the crescent itself is bright by light reflected from the Sun, the rest of the globe of the Moon has a pale glow by light reflected from the Earth. Neat to see and to photograph, even with a cell phone's camera held to the eyepiece of a small telescope of a binocular.
On other items:
To find one's way around the sky, one can use one's fists. Says Roy KD9RSE, the fist held at arm's length to the sky measures about 10 degrees of angular measure; half the fist's width would be five degrees; two fists side-by-side would represent about 20 degrees. It's a quick, crude, convenient way to measure the angular distance between night-sky objects.
There was also some discussion about the effect of smoke from fires in Canada. Of course, haze caused by the smoke and the smoke itself can dim starlight and obscure the planets and the Moon. The haze absorbs various wavelengths in the visible light range of the spectrum. As radio waves are part of that spectrum, they, too, are affected (by absorption, refraction, or attenuation) due to various atmospheric conditions such as fog, mist, rain, and snow and due to aerosols. As these conditions change and aerosols move around, so, too, can these changes and movements affect radio propagation.
Additional information about the effect of weather, the type and size of aerosols, and other factors in the atmosphere that can affect seeing (in the optical range) and propagation (in the radio range) will be posted separately as an Astro Net Addendum.
The Astro Net welcomed Tony KA8UGB, from New Buffalo (in southwest Michigan), who checked in with a strong signal, perhaps due to the current spate of conditions that have both enhanced and hindered propagation across several bands.
The Astro Net closed with thanks to all new and returning check-ins, and, to those who listen to the Net on RadioReference.com.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KD9VBE Randy
KD9WTJ Sarah
W9ABN Ed
KA9QJG Don
KA8UGB Tony
K9SGA Dan
KD9HOK Greg
KC9ER Ricky (post-Net check-in)
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next Astro Net on Wednesday, June 28, 2023, at 8:00 p.m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
On planet activity:
Over the past several Nets, Glenn KD9PNY and Roy KD9RSE have reported on the position and visibility of various planets in the evening and morning skies. Brilliant Venus still gleams brightly in the early evening sky for the rest of June. Like last month, Mars continues to show a pale orange color in the night sky, setting about 20 minutes after Venus, just before midnight. By month's end, both planets will appear close together, about 3.5 degrees apart (of angular measure).
In astronomical terms, that close appearance in the sky is called an appulse. By contrast, a conjunction is a closer apparition, where both planets occupy the same meridian of celestial longitude, or, almost appear to touch in the sky, but are really far apart in outer space. (At this link is the difference between the two terms, appulse versus conjunction.) And there are several good conjunctions coming up in the coming weeks, at this link.
In the meantime, pale yellow Saturn rises well ahead of the Sun in pre-dawn twilight, followed by bright-white Jupiter, above the horizon before dawn.
On solar activity:
Similar to the start of previous Nets, Roy KD9RSE and Glenn KD9PNY updated check-ins and listeners on conditions that still seem occasionally unfavorable for radio propagation (as of this posting). Band conditions have been up-and-down on certain bands, depending on the level of SFI and the status of the K and A indices and (of course) weather factors. Some bands have opened well on HF, while VHF/UHF signals have been plagued by intermittent static.
While weather factors (affecting either HF and VHF/UHF) will always be a distinct possibility to affect propagation, solar activity (as shown by its indices) has its part to play. A description of these indices and how they’re interpreted is found at this link; a more detailed discussion is found at this link.
Glenn KD9PNY alerted listeners to recent bursts from the Sun; a live look is found at this link, with the same Sun as seen through different wavelengths.
Roy KD9RSE followed up with ways to observe the Sun safely, including various filters for telescopes or actual solar scopes. (But never use a solar filter fitted onto an eyepiece; they heat up and break in focused sunlight.)
On lunar activity:
Glenn KD9PNY alerted listeners that the Moon, just before New Moon as a waning crescent or just after New Moon as a waxing crescent, may often show a phenomenon known as earthshine. At this link, earthshine is Earth's own brightness lit by the Sun reflected off the ball of the Moon not lit by the Sun at the Moon's crescent phases. So, while the crescent itself is bright by light reflected from the Sun, the rest of the globe of the Moon has a pale glow by light reflected from the Earth. Neat to see and to photograph, even with a cell phone's camera held to the eyepiece of a small telescope of a binocular.
On other items:
To find one's way around the sky, one can use one's fists. Says Roy KD9RSE, the fist held at arm's length to the sky measures about 10 degrees of angular measure; half the fist's width would be five degrees; two fists side-by-side would represent about 20 degrees. It's a quick, crude, convenient way to measure the angular distance between night-sky objects.
There was also some discussion about the effect of smoke from fires in Canada. Of course, haze caused by the smoke and the smoke itself can dim starlight and obscure the planets and the Moon. The haze absorbs various wavelengths in the visible light range of the spectrum. As radio waves are part of that spectrum, they, too, are affected (by absorption, refraction, or attenuation) due to various atmospheric conditions such as fog, mist, rain, and snow and due to aerosols. As these conditions change and aerosols move around, so, too, can these changes and movements affect radio propagation.
Additional information about the effect of weather, the type and size of aerosols, and other factors in the atmosphere that can affect seeing (in the optical range) and propagation (in the radio range) will be posted separately as an Astro Net Addendum.
The Astro Net welcomed Tony KA8UGB, from New Buffalo (in southwest Michigan), who checked in with a strong signal, perhaps due to the current spate of conditions that have both enhanced and hindered propagation across several bands.
The Astro Net closed with thanks to all new and returning check-ins, and, to those who listen to the Net on RadioReference.com.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KD9VBE Randy
KD9WTJ Sarah
W9ABN Ed
KA9QJG Don
KA8UGB Tony
K9SGA Dan
KD9HOK Greg
KC9ER Ricky (post-Net check-in)
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next Astro Net on Wednesday, June 28, 2023, at 8:00 p.m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
Astro Net Addendum, for June 14, 2023
From the 27th installment of the Astro Net on 6/14/2023 (above), there was a topic that's always timely and needs a little elaboration. From that recap:
"There was also some discussion about the effect of smoke from fires in Canada. Of course, haze caused by the smoke and the smoke itself can dim starlight and obscure the planets and the Moon. The haze absorbs various wavelengths in the visible light range of the spectrum. As radio waves are part of that spectrum, they, too, are affected (by absorption, refraction, or attenuation) due to various atmospheric conditions such as fog, mist, rain, and snow and due to aerosols. As these conditions change and aerosols move around, so, too, can these changes and movements affect radio propagation."
Others have already posted information like this previously; but, as a follow-up, here's an addendum to the recent Astro Net, on various effects to the medium of radio.
Reflection, refraction, scattering, absorption, diffraction, ducting. Definitions at this link.
Radio wavelengths vs optical wavelengths. Atmospheric effects on wavelengths that reach radios, some of these same terms can also describe atmospheric effects on optical wavelengths that reach telescopes.
Ducting. Details at this link (with a ~13-minute video).
Ducting and E-skip. Another angle on ducting and on E-skip, at this link.
Precipitation and its size. Described at this link (from paragraph, above); higher bands can be affected more greatly by rain, which apparently can serve to enhance propagation by "rain scatter", at this link.
Seasonal shifts in propagation. For the start of each season at this link, you can find a general forecast and description.
Aerosols. Not only moisture in its various forms can directly affect radio-wave transmission; but, since aerosols can absorb or scatter light and induce the formation of clouds, they are an indirect part of atmosphere's effects on radio waves.
Foliage. Even green, growing things may have an effect on some propagation.
Solar effects. Of course, the Sun has the most effect on radio propagation, at this link.
Solar activity. Current conditions of the Sun on HF band propagation, at this link. More detailed link here.
"There was also some discussion about the effect of smoke from fires in Canada. Of course, haze caused by the smoke and the smoke itself can dim starlight and obscure the planets and the Moon. The haze absorbs various wavelengths in the visible light range of the spectrum. As radio waves are part of that spectrum, they, too, are affected (by absorption, refraction, or attenuation) due to various atmospheric conditions such as fog, mist, rain, and snow and due to aerosols. As these conditions change and aerosols move around, so, too, can these changes and movements affect radio propagation."
Others have already posted information like this previously; but, as a follow-up, here's an addendum to the recent Astro Net, on various effects to the medium of radio.
Reflection, refraction, scattering, absorption, diffraction, ducting. Definitions at this link.
Radio wavelengths vs optical wavelengths. Atmospheric effects on wavelengths that reach radios, some of these same terms can also describe atmospheric effects on optical wavelengths that reach telescopes.
Ducting. Details at this link (with a ~13-minute video).
Ducting and E-skip. Another angle on ducting and on E-skip, at this link.
Precipitation and its size. Described at this link (from paragraph, above); higher bands can be affected more greatly by rain, which apparently can serve to enhance propagation by "rain scatter", at this link.
Seasonal shifts in propagation. For the start of each season at this link, you can find a general forecast and description.
Aerosols. Not only moisture in its various forms can directly affect radio-wave transmission; but, since aerosols can absorb or scatter light and induce the formation of clouds, they are an indirect part of atmosphere's effects on radio waves.
Foliage. Even green, growing things may have an effect on some propagation.
Solar effects. Of course, the Sun has the most effect on radio propagation, at this link.
Solar activity. Current conditions of the Sun on HF band propagation, at this link. More detailed link here.
Astro Net recap, for June 7, 2023
Highlights from on-the-air ham radio transmission on 147.045 MHz
For the 26th installment of the Astro Net on 6/7/2023, this for tonight was an unscheduled and spontaneous Net, nicknamed our "Howl-at-the-Moon" Astro Net, to celebrate the recent appearance of the Strawberry Moon for the month of June.
Here is a summary (not a transcript) of various topics that check-ins had the chance to discuss on-the-air.
On solar activity:
Roy KD9RSE and Glenn KD9PNY updated check-ins and listeners on conditions that still seem occasionally unfavorable for radio propagation. While it’s known that a relatively high SFI can affect (or enhance) radio propagation, band conditions have been poor to unstable on certain bands, depending on the status of the K and A indices and weather factors. (Like last Net as well, a description of these indices and how they’re interpreted is found at this link; a more detailed discussion at this link.)
On planet activity:
In a repetition of recent observations and over the past several Nets, Glenn KD9PNY and Roy KD9RSE have reported on the position and visibility of various planets in the evening and morning skies. Brilliant Venus still gleams brightly in the early evening sky for the rest of May and through early June. Pale yellow Saturn rises ahead of the Sun in morning twilight, followed by bright-white and mighty Jupiter, just above the horizon before dawn; Mercury creeps just above the horizon by mid-month and may be difficult to see by eye, so a binocular or telescope may be needed.
On observations in general:
Joe KC9EQJ offered his take on observing the night sky with his favorite phone apps, such as Sky Guide and Sky Walk, which provide amateur astronomers and the casual observer with phone-app software to identify favorite celestial object and constellations in the night sky. Joe also expressed interest in Egyptian mythology and the construction of pyramids, including the ongoing discussions that pits the Orion viewpoint of how the pyramids were built versus the Cygnus viewpoint that claims a greater match of historical significance for the construction of the pyramids. Readers decide!
But no matter the preferred alignment of Orion versus Cygnus, it is significant, though, that archaeoastronomers (that is, those who study ancient astronomical alignments and myths) do conclude that the pyramids appear to have been aligned to the so-called north star at the time, Thuban (in Draco, the Dragon). But both viewpoints can't be correct if Thuban is indeed an alignment star; so, again, readers decide!
On other items:
Being an impromptu Astro Net, the check-ins might've howled at the Moon with a variety of topics that came fast.
Paul KF9ER brought a topic from a discussion on the repeater prior to the start of this Net, namely, concerning the effect of atmospheric effects, including "tropospheric ducting" on propagation of VHF/UHF. In response, Roy KD9RSE indicated that while no one definitive answer covers all of the prospects of how the ducting might occur (since the atmosphere is ever-changing) or its effect on various bands, a review of basic effects might be gleaned from a link here, that offers insights on how weather conditions (in general) can affect cell-phone operation; a link here, that portrays a somewhat dynamic map of tropospheric ducting; and, a link here, that helps explain how such ducting appears to be a function of relative humidity (i.e., water vapor content in the air for a given temperature aloft) and the resultant inversion that helps to form the mechanism of "ducting" itself.
A surprise entry to this impromptu Net was the check-in from Randy KD9VBE from Potato Creek Park, near North Liberty, IN, who'd apparently planned to activate the park as part of a POTA endeavor. His 2-meter antenna at his campout QTH was a homebuilt device (likely his dipole on a 35-foot painter pole), as featured in one of his previous posts to the news group. Don KA9QJG and Randy KD9VBE shared some of the fine points about cleaning catfish. At this link and at this link are ways to do it; all who catch catfish perhaps will howl at the Moon about their favorite methods. With an impromptu Net, we catch topics as they pop up and let them flop about a while, like fish out of water.
Glenn KD9PNY allowed some third-party traffic from the Space Weather Woman, also a ham radio enthusiast, who alerted earthly hams to the prospect of enhanced radio propagation but also solar storms brushing past our home planet. Don KA9QJG played the latest installment from the Space Weather Woman, Dr. Tamitha Skov, for all eager listeners.
The Astro Net closed with thanks to all new and returning check-ins, and, to those who listen to the Net on RadioReference.com.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KA9QJG Don
KF9ER Paul
KD9HOK Greg
K9SGA Dan
KC9EQJ Joe
KD9HOK Greg
W9JOM Jim
KD9VBE Randy
KD9OIQ Tony (late, post-Net check-in)
This was a spontaneous Astro Net, because we wanted to do it. We thank you for the spontaneity to check in and have fun with us.
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next (scheduled) Astro Net on Wednesday, June 14, 2023, at 8:00 p.m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
Here is a summary (not a transcript) of various topics that check-ins had the chance to discuss on-the-air.
On solar activity:
Roy KD9RSE and Glenn KD9PNY updated check-ins and listeners on conditions that still seem occasionally unfavorable for radio propagation. While it’s known that a relatively high SFI can affect (or enhance) radio propagation, band conditions have been poor to unstable on certain bands, depending on the status of the K and A indices and weather factors. (Like last Net as well, a description of these indices and how they’re interpreted is found at this link; a more detailed discussion at this link.)
On planet activity:
In a repetition of recent observations and over the past several Nets, Glenn KD9PNY and Roy KD9RSE have reported on the position and visibility of various planets in the evening and morning skies. Brilliant Venus still gleams brightly in the early evening sky for the rest of May and through early June. Pale yellow Saturn rises ahead of the Sun in morning twilight, followed by bright-white and mighty Jupiter, just above the horizon before dawn; Mercury creeps just above the horizon by mid-month and may be difficult to see by eye, so a binocular or telescope may be needed.
On observations in general:
Joe KC9EQJ offered his take on observing the night sky with his favorite phone apps, such as Sky Guide and Sky Walk, which provide amateur astronomers and the casual observer with phone-app software to identify favorite celestial object and constellations in the night sky. Joe also expressed interest in Egyptian mythology and the construction of pyramids, including the ongoing discussions that pits the Orion viewpoint of how the pyramids were built versus the Cygnus viewpoint that claims a greater match of historical significance for the construction of the pyramids. Readers decide!
But no matter the preferred alignment of Orion versus Cygnus, it is significant, though, that archaeoastronomers (that is, those who study ancient astronomical alignments and myths) do conclude that the pyramids appear to have been aligned to the so-called north star at the time, Thuban (in Draco, the Dragon). But both viewpoints can't be correct if Thuban is indeed an alignment star; so, again, readers decide!
On other items:
Being an impromptu Astro Net, the check-ins might've howled at the Moon with a variety of topics that came fast.
Paul KF9ER brought a topic from a discussion on the repeater prior to the start of this Net, namely, concerning the effect of atmospheric effects, including "tropospheric ducting" on propagation of VHF/UHF. In response, Roy KD9RSE indicated that while no one definitive answer covers all of the prospects of how the ducting might occur (since the atmosphere is ever-changing) or its effect on various bands, a review of basic effects might be gleaned from a link here, that offers insights on how weather conditions (in general) can affect cell-phone operation; a link here, that portrays a somewhat dynamic map of tropospheric ducting; and, a link here, that helps explain how such ducting appears to be a function of relative humidity (i.e., water vapor content in the air for a given temperature aloft) and the resultant inversion that helps to form the mechanism of "ducting" itself.
A surprise entry to this impromptu Net was the check-in from Randy KD9VBE from Potato Creek Park, near North Liberty, IN, who'd apparently planned to activate the park as part of a POTA endeavor. His 2-meter antenna at his campout QTH was a homebuilt device (likely his dipole on a 35-foot painter pole), as featured in one of his previous posts to the news group. Don KA9QJG and Randy KD9VBE shared some of the fine points about cleaning catfish. At this link and at this link are ways to do it; all who catch catfish perhaps will howl at the Moon about their favorite methods. With an impromptu Net, we catch topics as they pop up and let them flop about a while, like fish out of water.
Glenn KD9PNY allowed some third-party traffic from the Space Weather Woman, also a ham radio enthusiast, who alerted earthly hams to the prospect of enhanced radio propagation but also solar storms brushing past our home planet. Don KA9QJG played the latest installment from the Space Weather Woman, Dr. Tamitha Skov, for all eager listeners.
The Astro Net closed with thanks to all new and returning check-ins, and, to those who listen to the Net on RadioReference.com.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KA9QJG Don
KF9ER Paul
KD9HOK Greg
K9SGA Dan
KC9EQJ Joe
KD9HOK Greg
W9JOM Jim
KD9VBE Randy
KD9OIQ Tony (late, post-Net check-in)
This was a spontaneous Astro Net, because we wanted to do it. We thank you for the spontaneity to check in and have fun with us.
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next (scheduled) Astro Net on Wednesday, June 14, 2023, at 8:00 p.m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
Astro Net recap, for May 24, 2023
Highlights from on-the-air ham radio transmission on 147.045 MHz
For the 25th installment of the Astro Net on 5/24/2023, our silver anniversary of on-the-air amateur-astronomy sessions, here is a summary (not a transcript) of various topics that check-ins had the chance to discuss on-the-air.
On space activity:
Glenn KD9PNY highlighted recent launches of private rocket companies, including a recent launch by Axiom. Don KD9QJG wondered about the utility of private rocket companies, whether they do more than NASA has done.
In response, Roy KD9RSE briefly outlined how private companies, like SpaceX, have worked with NASA for use of its launch facilities (already funded by taxpayers), to design, build, and launch rockets for carrying cargo into Earth orbit and crews to the International Space Station (ISS), often faster and more cheaply than NASA; but, not without successes and failures along the way. A brief history of SpaceX at this link.
Don KD9QJG wondered about the amount of space junk orbiting Earth and the hazards it can pose. To add to this, the ISS itself will one day be considered space junk as NASA plans to dismantle it and bring it down from orbit. According to NASA, this action might then allow private companies to build and launch their own space stations into orbit.
On solar activity:
Similar to the start of previous Nets, Roy KD9RSE and Glenn KD9PNY updated check-ins and listeners on conditions that still seem occasionally unfavorable for radio propagation (as of this posting). While it’s known that a relatively high SFI can affect (or enhance) radio propagation, band conditions have been poor to unstable on certain bands, depending on the status of the K and A indices and weather factors. (A description of these indices and how they’re interpreted is found at this link; a more detailed discussion at this link.)
As outlined in recent Nets, solar flares and coronal mass ejections are also those solar activities that can be the most concerning to us as ham radio operators. Various online outlets post real-time or delayed-play images of the Sun, such at this link, while alerts and effects of solar activity are shown at this link.
Greg KD9HOK inquired about the anticipated peak of Cycle 25 (the current sunspot cycle), which is expected to reach its maximum by July 2025, described at this link (with previous predictions of activity included), while this link claims the current cycle may peak in 2024.
On planet activity:
Over the past several Nets, Glenn KD9PNY and Roy KD9RSE have reported on the position and visibility of various planets in the evening and morning skies. Brilliant Venus still gleams brightly in the early evening sky for the rest of May and through early June. Like last month, Mars (near the reddish star Aldebaran in Taurus, the Bull) continues to show a pale orange color in the night sky, setting after midnight. Pale yellow Saturn rises ahead of the Sun in morning twilight, followed by bright-white and mighty Jupiter, just above the horizon before dawn.
On other items:
In a roundup of comments from check-ins by Glenn KD9PNY, several additional comments came up for discussion.
Don KD9QJG asked how rockets and space stations stay in orbit, and, about the concept of "weightlessness" in outer space. In response, Roy KD9RSE outlined aspects of a rocket launch, that as an object achieves a sufficient height above Earth’s surface (at least 100 km, or 62 miles) and a sufficient speed of about 18,000 mph, the object can likely orbit the Earth.
This means that Earth’s gravity still "pulls" at the object to bring it down; but, if the object has enough momentum (or, forward velocity for its size), then the object constantly falls to Earth as it moves forward. That is, the object actually "falls" around the Earth (as described by Isaac Newton), which is what orbiting the Earth means.
For any items on-board the spacecraft, they "fall" as fast the rocket itself; so, any loose items inside the spacecraft appear to float, though all are falling at the same rate.
For any object exiting the orbiting spacecraft (such as an astronaut or junk dumped overboard), those items will move right along with the spacecraft in its orbit, since they were launched with the rocket. Over time, though, objects in low-Earth orbit might still encounter some air drag from the the thinnest part of the upper atmosphere, the effect of which might separate abandoned astronauts or ejected contraband from their spacecraft, creating a problem for retrieval but also more space debris.
That amateurs can attempt a Moonbounce (or EME) experiment and that Mars was close to Earth back in 2003, Dan W9SGA wondered whether a "Mars-bounce" radio experiment was attempted or could be tried today. This and other kinds of radio bounce experiments have been discussed in online ham-radio forums and at this website.
Glenn KD9PNY briefly discussed the prospects of meteor scatter; Don KA9QJG told a story about a fellow ham who attempted it.
And for any object in orbit, such as the ISS, about 250 miles up, moving over one’s own location at a given moment, contacting it by ham radio would be fairly instantaneous.
Ben KB9CBY checked in to ask Don KD9QJG about mutual friends who’d planned to transmit from Canada. Given recent solar activity and uncertain band conditions, Don said he’d post information (as he gets it) to the news group, to let others attempt to tune in fellow hams up in the north woods of Canada.
About this Net ~
Roy KD9RSE and Glenn KD9PNY commemorated the Astro Net’s silver anniversary on-the-air; that is, we’ve presented 25 installments of this endeavor of amateur astronomy on amateur radio. So far, it’s been out-of-this-world (or other-worldly, depending on your point of view).
The Astro Net closed with thanks to all new and returning check-ins, and, to those who listen to the Net on RadioReference.com.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KD9QGP Dustin
KD9TFA Briar
W9ABN Ed
KA9QJG Don
KD9HOK Greg
KD9VBE Randy
N9ODN Mike
K9SGA Dan
N9IQ Steve
KD9CBY Ben
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next Astro Net on Wednesday, June 14, 2023, at 8:00 p.m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
On space activity:
Glenn KD9PNY highlighted recent launches of private rocket companies, including a recent launch by Axiom. Don KD9QJG wondered about the utility of private rocket companies, whether they do more than NASA has done.
In response, Roy KD9RSE briefly outlined how private companies, like SpaceX, have worked with NASA for use of its launch facilities (already funded by taxpayers), to design, build, and launch rockets for carrying cargo into Earth orbit and crews to the International Space Station (ISS), often faster and more cheaply than NASA; but, not without successes and failures along the way. A brief history of SpaceX at this link.
Don KD9QJG wondered about the amount of space junk orbiting Earth and the hazards it can pose. To add to this, the ISS itself will one day be considered space junk as NASA plans to dismantle it and bring it down from orbit. According to NASA, this action might then allow private companies to build and launch their own space stations into orbit.
On solar activity:
Similar to the start of previous Nets, Roy KD9RSE and Glenn KD9PNY updated check-ins and listeners on conditions that still seem occasionally unfavorable for radio propagation (as of this posting). While it’s known that a relatively high SFI can affect (or enhance) radio propagation, band conditions have been poor to unstable on certain bands, depending on the status of the K and A indices and weather factors. (A description of these indices and how they’re interpreted is found at this link; a more detailed discussion at this link.)
As outlined in recent Nets, solar flares and coronal mass ejections are also those solar activities that can be the most concerning to us as ham radio operators. Various online outlets post real-time or delayed-play images of the Sun, such at this link, while alerts and effects of solar activity are shown at this link.
Greg KD9HOK inquired about the anticipated peak of Cycle 25 (the current sunspot cycle), which is expected to reach its maximum by July 2025, described at this link (with previous predictions of activity included), while this link claims the current cycle may peak in 2024.
On planet activity:
Over the past several Nets, Glenn KD9PNY and Roy KD9RSE have reported on the position and visibility of various planets in the evening and morning skies. Brilliant Venus still gleams brightly in the early evening sky for the rest of May and through early June. Like last month, Mars (near the reddish star Aldebaran in Taurus, the Bull) continues to show a pale orange color in the night sky, setting after midnight. Pale yellow Saturn rises ahead of the Sun in morning twilight, followed by bright-white and mighty Jupiter, just above the horizon before dawn.
On other items:
In a roundup of comments from check-ins by Glenn KD9PNY, several additional comments came up for discussion.
Don KD9QJG asked how rockets and space stations stay in orbit, and, about the concept of "weightlessness" in outer space. In response, Roy KD9RSE outlined aspects of a rocket launch, that as an object achieves a sufficient height above Earth’s surface (at least 100 km, or 62 miles) and a sufficient speed of about 18,000 mph, the object can likely orbit the Earth.
This means that Earth’s gravity still "pulls" at the object to bring it down; but, if the object has enough momentum (or, forward velocity for its size), then the object constantly falls to Earth as it moves forward. That is, the object actually "falls" around the Earth (as described by Isaac Newton), which is what orbiting the Earth means.
For any items on-board the spacecraft, they "fall" as fast the rocket itself; so, any loose items inside the spacecraft appear to float, though all are falling at the same rate.
For any object exiting the orbiting spacecraft (such as an astronaut or junk dumped overboard), those items will move right along with the spacecraft in its orbit, since they were launched with the rocket. Over time, though, objects in low-Earth orbit might still encounter some air drag from the the thinnest part of the upper atmosphere, the effect of which might separate abandoned astronauts or ejected contraband from their spacecraft, creating a problem for retrieval but also more space debris.
That amateurs can attempt a Moonbounce (or EME) experiment and that Mars was close to Earth back in 2003, Dan W9SGA wondered whether a "Mars-bounce" radio experiment was attempted or could be tried today. This and other kinds of radio bounce experiments have been discussed in online ham-radio forums and at this website.
Glenn KD9PNY briefly discussed the prospects of meteor scatter; Don KA9QJG told a story about a fellow ham who attempted it.
And for any object in orbit, such as the ISS, about 250 miles up, moving over one’s own location at a given moment, contacting it by ham radio would be fairly instantaneous.
Ben KB9CBY checked in to ask Don KD9QJG about mutual friends who’d planned to transmit from Canada. Given recent solar activity and uncertain band conditions, Don said he’d post information (as he gets it) to the news group, to let others attempt to tune in fellow hams up in the north woods of Canada.
About this Net ~
Roy KD9RSE and Glenn KD9PNY commemorated the Astro Net’s silver anniversary on-the-air; that is, we’ve presented 25 installments of this endeavor of amateur astronomy on amateur radio. So far, it’s been out-of-this-world (or other-worldly, depending on your point of view).
The Astro Net closed with thanks to all new and returning check-ins, and, to those who listen to the Net on RadioReference.com.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KD9QGP Dustin
KD9TFA Briar
W9ABN Ed
KA9QJG Don
KD9HOK Greg
KD9VBE Randy
N9ODN Mike
K9SGA Dan
N9IQ Steve
KD9CBY Ben
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next Astro Net on Wednesday, June 14, 2023, at 8:00 p.m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
Astro Net recap, for May 10, 2023
Highlights from on-the-air ham radio transmission on 147.045 MHz
For the 24th installment of the Astro Net on 5/10/2023, here is a summary (not a transcript) of various topics that check-ins had the chance to discuss on-the-air.
On solar activity:
Similar to the start of previous Nets, Roy KD9RSE and Glenn KD9PNY updated check-ins and listeners on recent solar indices that seem unfavorable for radio propagation. While a relatively high SFI can affect radio propagation, the recent and quick changes in solar conditions resulted in unexpected opening for north-south Tx and Rx and then a switch to east-west; bands conditions have been poor to unstable. As outlined in recent Nets, solar flares and coronal mass ejections (CME) are those solar activities that can be the most concerning to us. Their effects can be problematic or potentially devastating. Various online outlets will post real-time or delayed-play images of the Sun, such at this link, while alerts and effects of solar activity are shown at this link.
While Cycle 25 (the current sunspot cycle) was touted some years ago as a possible high-sunspot cycle, at present this cycle is keeping pace with the previous (and relatively low) Cycle 24. Other sources (such as at this link) say that the current is overly strong and on pace to get better.
Roy KD9RSE maintains that the current cycle won’t be any better than Cycle 24. This is not due to any negative expectations about the prospects for this cycle; rather, he explained his conclusion by an application of a forecast method used in meteorology called persistence. That is, a simple weather-prediction method called persistence says that there is the possibility that a spell of good weather (or certain conditions) can persist for a while longer than the present time; this method is used to explain why some conditions linger.
Roy KD9RSE concludes that if one examines past sunspot records for the last half-dozen cycles (such at this link), one could reasonably conclude that Cycle 25 would no better than Cycle 24. Whether it’s correct or adequate to apply a meteorological method to an astronomical phenomenon, we’ll see what happens. Cycle 25 is on tap to peak in July 2025.
After this Net, Don KA9QJG ran a podcast from Dr. Tamitha Skov, the Space Weather Woman (callsign WX6SWW), on the recent solar activity bombarding Earth this week.
On planet activity:
Over the past several Nets, Glenn KD9PNY and Roy KD9RSE have reported on the position and visibility of various planets this month. Brilliant Venus still dominates the early evening sky throughout the month of April. Mars (near the reddish star Aldebaran in Taurus, the Bull) continues to gleam in the night sky, setting a couple hours after Venus, or, after midnight. Saturn rises ahead of the Sun in morning twilight; currently lost in the glare of the Sun, Jupiter's to follow by month’s end.
On other items:
In a roundup of comments from check-ins by Glenn KD9PNY, several additional comments came up for discussion.
About black holes ~
Jon KC9VUA asked about whether recent speculation that black holes might be a source of antimatter. That intitial question might be answered at this link (though the article might be behind a paywall); essentially, that article indicates that mathematical simulations seem to suggest that black holes can generate antimatter.
In response, Roy KD9RSE indicated that he’d provide some links to broaden the scope of the question, to address the definition of black holes and their apparent opposite, known as white holes, which admittedly are speculative and require more study. The former attracts radiation and traps it; the latter flings radiation far and wide. But the idea of black holes as a source of antimatter has been around for a few years, and still is discussed in journal articles.
About dark energy ~
Jon KC9VUA also asked about the designation of dark energy. While claiming no expertise in this field, Roy KD9RSE indicated that the concept of dark energy was needed to explain phenomena that helped to round out the current view of how, in astrophysical terms, our universe might actually work. Note at this link how dark energy is tied to other exotic descriptions of things unseen (like cold dark matter), but apparently is needed by astrophysicists at present, to explain how the cosmos works. Though dark energy was originally a joke name, coined in 1998 by this astrophysicist at the Kavli Institute, this same astrophysicist claims that scientists really don’t know yet what dark energy and these other exotic cosmic items might be.
About polarity of sunspots ~
While geomagnetic storm alerts are already issued for radio blackouts in the coming days, Dan W9SGA asked about the recent "reverse sunspot" in the news. Glenn KD9PNY described the possible effects that may be seen on Earth from the release of debris from the Sun by the appearance of this unusual sunspot, while Roy KD9RSE explained why the rogue sunspot is known a "reverse" or "backward" one.
One indicator of a new solar cycle is the magnetic polarity of the Sun, which reverses every solar cycle; a solar cycle lasts about 11 years. But the Sun’s polarity (where North becomes South and vice versa) then returns to its starting polarity after another 11 years; so, the Sun retains a distinct polarity for about 22 years, until it reverses again (or, South becomes North again and so on).
Sunspots, which often appear in pairs, have polarity, too, one of "positive" polarity and one of "negative" polarity (like a battery), which can be confirmed by observing the Zeeman effect of the sunspot’s spectra. That is, the spectrum from a sunspot, as seen through the magnetic field of the Sun, will show a distinct pattern, which can help to ascertain the polarity of the sunspot under observation. While most sunspots will have a certain polarity during a solar cycle, an occasional rogue spot can appear, which has the reverse polarity of the norm for that solar cycle.
About reactions to observations ~
It is readily apparent that the universe, as we see it, still needs explanation, and that scientists seek and argue to explain what they see and how to interpret it. For example, while the current view of the cosmos holds that quasars (i.e., bright, energetic star-like objects) are distant and not yet fully explained, scientists also theorize they contain enormous black holes. One long-time respected astronomer, Halton Arp, challenged the view that quasars were indeed distant. Arp had done seminal work and was considered, at one time, an authority in the identification of peculiar galaxies and their evolution; but, his unorthodox views challenged the contemporary view of today’s cosmos.
What was his unorthodox view? That quasars were associated with, or actually a physical part of peculiar galaxies, not distant entities all their own, because quasars seem to cluster around peculiar galaxies. No one else had a reason why; Arp proposed his reasons, but his peers didn’t accept them (and, at the time, offered no explanations of their own). Subsequently, he was ostracized by his former peers.
In more recent imagery of peculiar galaxies, scientists conclude that Arp’s idea (of odd galaxies producing, or associated with, quasars) are actually galaxies-in-collision, an idea that Arp disputed; they also criticize Arp’s own conclusions as "bad mathematics". As the origination of quasars still remains a puzzle, some scientists claim to have found the answer using computer modeling.
Arp did not rely on computer modeling; however unacceptable at the time, he did offer an explanation, based on his interpretation of actual observations.
About a radio ~
On a side note, Shawn AC9ZY professed trouble with his Icom IC-706MKIIG rig and its continuing "clicking" noise (which he outlined in the previous evening’s Tech Net). Don KA9QJG said he’d send information (provided by Jim W9JOM) on a possible fix. (This link from a news group appears to discuss that clicking sound and other problems with the IC-706.)
About this Net ~
Roy KD9RSE also commemorated the Astro Net’s first full year of operation on-the-air! The Astro Net launched last year on May 4 with its suborbital test flight, then found its way officially into orbit a week later on May 11. We’re glad to scan the skies over the KA9QJG repeater. At our next Astro Net, we’ll celebrate a silver anniversary of 25 installments of this on-the-air endeavor.
The Astro Net closed with thanks to all new and returning check-ins, and, to those who listen to the Net on RadioReference.com.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KD9QJG Don
KC9UNS Ben
W9JOM Jim
KD9QGP Dustin
AC9ZY Shawn
K9QKE Tim
KC9VUA Jon
K9SGA Dan
KD9HOK Greg
N9TIP Don
KD9AQO Brian
KD9VBE Randy
N9XCD Bob
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next Astro Net on Wednesday, May 24, 2023, at 8:00 p.m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
On solar activity:
Similar to the start of previous Nets, Roy KD9RSE and Glenn KD9PNY updated check-ins and listeners on recent solar indices that seem unfavorable for radio propagation. While a relatively high SFI can affect radio propagation, the recent and quick changes in solar conditions resulted in unexpected opening for north-south Tx and Rx and then a switch to east-west; bands conditions have been poor to unstable. As outlined in recent Nets, solar flares and coronal mass ejections (CME) are those solar activities that can be the most concerning to us. Their effects can be problematic or potentially devastating. Various online outlets will post real-time or delayed-play images of the Sun, such at this link, while alerts and effects of solar activity are shown at this link.
While Cycle 25 (the current sunspot cycle) was touted some years ago as a possible high-sunspot cycle, at present this cycle is keeping pace with the previous (and relatively low) Cycle 24. Other sources (such as at this link) say that the current is overly strong and on pace to get better.
Roy KD9RSE maintains that the current cycle won’t be any better than Cycle 24. This is not due to any negative expectations about the prospects for this cycle; rather, he explained his conclusion by an application of a forecast method used in meteorology called persistence. That is, a simple weather-prediction method called persistence says that there is the possibility that a spell of good weather (or certain conditions) can persist for a while longer than the present time; this method is used to explain why some conditions linger.
Roy KD9RSE concludes that if one examines past sunspot records for the last half-dozen cycles (such at this link), one could reasonably conclude that Cycle 25 would no better than Cycle 24. Whether it’s correct or adequate to apply a meteorological method to an astronomical phenomenon, we’ll see what happens. Cycle 25 is on tap to peak in July 2025.
After this Net, Don KA9QJG ran a podcast from Dr. Tamitha Skov, the Space Weather Woman (callsign WX6SWW), on the recent solar activity bombarding Earth this week.
On planet activity:
Over the past several Nets, Glenn KD9PNY and Roy KD9RSE have reported on the position and visibility of various planets this month. Brilliant Venus still dominates the early evening sky throughout the month of April. Mars (near the reddish star Aldebaran in Taurus, the Bull) continues to gleam in the night sky, setting a couple hours after Venus, or, after midnight. Saturn rises ahead of the Sun in morning twilight; currently lost in the glare of the Sun, Jupiter's to follow by month’s end.
On other items:
In a roundup of comments from check-ins by Glenn KD9PNY, several additional comments came up for discussion.
About black holes ~
Jon KC9VUA asked about whether recent speculation that black holes might be a source of antimatter. That intitial question might be answered at this link (though the article might be behind a paywall); essentially, that article indicates that mathematical simulations seem to suggest that black holes can generate antimatter.
In response, Roy KD9RSE indicated that he’d provide some links to broaden the scope of the question, to address the definition of black holes and their apparent opposite, known as white holes, which admittedly are speculative and require more study. The former attracts radiation and traps it; the latter flings radiation far and wide. But the idea of black holes as a source of antimatter has been around for a few years, and still is discussed in journal articles.
About dark energy ~
Jon KC9VUA also asked about the designation of dark energy. While claiming no expertise in this field, Roy KD9RSE indicated that the concept of dark energy was needed to explain phenomena that helped to round out the current view of how, in astrophysical terms, our universe might actually work. Note at this link how dark energy is tied to other exotic descriptions of things unseen (like cold dark matter), but apparently is needed by astrophysicists at present, to explain how the cosmos works. Though dark energy was originally a joke name, coined in 1998 by this astrophysicist at the Kavli Institute, this same astrophysicist claims that scientists really don’t know yet what dark energy and these other exotic cosmic items might be.
About polarity of sunspots ~
While geomagnetic storm alerts are already issued for radio blackouts in the coming days, Dan W9SGA asked about the recent "reverse sunspot" in the news. Glenn KD9PNY described the possible effects that may be seen on Earth from the release of debris from the Sun by the appearance of this unusual sunspot, while Roy KD9RSE explained why the rogue sunspot is known a "reverse" or "backward" one.
One indicator of a new solar cycle is the magnetic polarity of the Sun, which reverses every solar cycle; a solar cycle lasts about 11 years. But the Sun’s polarity (where North becomes South and vice versa) then returns to its starting polarity after another 11 years; so, the Sun retains a distinct polarity for about 22 years, until it reverses again (or, South becomes North again and so on).
Sunspots, which often appear in pairs, have polarity, too, one of "positive" polarity and one of "negative" polarity (like a battery), which can be confirmed by observing the Zeeman effect of the sunspot’s spectra. That is, the spectrum from a sunspot, as seen through the magnetic field of the Sun, will show a distinct pattern, which can help to ascertain the polarity of the sunspot under observation. While most sunspots will have a certain polarity during a solar cycle, an occasional rogue spot can appear, which has the reverse polarity of the norm for that solar cycle.
About reactions to observations ~
It is readily apparent that the universe, as we see it, still needs explanation, and that scientists seek and argue to explain what they see and how to interpret it. For example, while the current view of the cosmos holds that quasars (i.e., bright, energetic star-like objects) are distant and not yet fully explained, scientists also theorize they contain enormous black holes. One long-time respected astronomer, Halton Arp, challenged the view that quasars were indeed distant. Arp had done seminal work and was considered, at one time, an authority in the identification of peculiar galaxies and their evolution; but, his unorthodox views challenged the contemporary view of today’s cosmos.
What was his unorthodox view? That quasars were associated with, or actually a physical part of peculiar galaxies, not distant entities all their own, because quasars seem to cluster around peculiar galaxies. No one else had a reason why; Arp proposed his reasons, but his peers didn’t accept them (and, at the time, offered no explanations of their own). Subsequently, he was ostracized by his former peers.
In more recent imagery of peculiar galaxies, scientists conclude that Arp’s idea (of odd galaxies producing, or associated with, quasars) are actually galaxies-in-collision, an idea that Arp disputed; they also criticize Arp’s own conclusions as "bad mathematics". As the origination of quasars still remains a puzzle, some scientists claim to have found the answer using computer modeling.
Arp did not rely on computer modeling; however unacceptable at the time, he did offer an explanation, based on his interpretation of actual observations.
About a radio ~
On a side note, Shawn AC9ZY professed trouble with his Icom IC-706MKIIG rig and its continuing "clicking" noise (which he outlined in the previous evening’s Tech Net). Don KA9QJG said he’d send information (provided by Jim W9JOM) on a possible fix. (This link from a news group appears to discuss that clicking sound and other problems with the IC-706.)
About this Net ~
Roy KD9RSE also commemorated the Astro Net’s first full year of operation on-the-air! The Astro Net launched last year on May 4 with its suborbital test flight, then found its way officially into orbit a week later on May 11. We’re glad to scan the skies over the KA9QJG repeater. At our next Astro Net, we’ll celebrate a silver anniversary of 25 installments of this on-the-air endeavor.
The Astro Net closed with thanks to all new and returning check-ins, and, to those who listen to the Net on RadioReference.com.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KD9QJG Don
KC9UNS Ben
W9JOM Jim
KD9QGP Dustin
AC9ZY Shawn
K9QKE Tim
KC9VUA Jon
K9SGA Dan
KD9HOK Greg
N9TIP Don
KD9AQO Brian
KD9VBE Randy
N9XCD Bob
The Astro Net airs every second and fourth full week of each month, on Wednesday evening of those weeks. Tune in to the next Astro Net on Wednesday, May 24, 2023, at 8:00 p.m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
Astro Net recap, for April 26, 2023
Highlights from on-the-air ham radio transmission on 147.045 MHz
For the 23rd installment of the Astro Net on 4/26/2023, here is a summary (not a transcript) of various topics that check-ins had the chance to discuss on-the-air.
On solar activity:
Roy KD9RSE and Glenn KD9PNY updated check-ins and listeners on recent solar indices that seem unfavorable for radio propagation. While we as amateur radio operators are always on the look-out for solar activity that can affect radio propagation, it is good to know the effects of that activity. So, solar flares and coronal mass ejections (CME) are those solar activities that can be the most concerning to us. Both solar flares and CMEs are described at this link. Their effects can be problematic (as outlined at this link) or potentially devastating (as described at this link).
While the blast of light from the initial flare leaves the Sun at the speed of light, the high-energy particles accompanying a flare may travel more slowly and would then arrive (say, at Earth) some minutes later; a CME is a more massive explosion of the Sun's atmosphere (called the corona) that lifts off the surface of the Sun and is hurled in outer space, and it may take a couple days to arrive. Various online outlets will post real-time or delayed-play images of the Sun, such at Spacweather.com (at this link) or from NASA's SOHO spacecraft (at this link and at this link for various wavelengths).
For us on Earth, one result of solar activity can be the display of the Aurora Borealis (the Northern Lights, at this link); by contrast, at the same time, a mirror-image of the northern lights is seen as the Auroral Australis (the Southern Lights, at this link).
On planet activity:
Over the past several Nets, Glenn KD9PNY and Roy KD9RSE have reported on the position and visibility of various planets this month. Brilliant Venus still dominates the early evening sky throughout the month of April. Mars (near the reddish star Aldebaran in Taurus, the Bull) continues to gleam in the night sky, setting a couple hours after Venus, or, after midnight. Saturn rises ahead of the Sun in morning twilight. Find these planet positions on charts at this link.
At this link, also posted in the previous installments of the Astro Net recap, is a list of times at which the planets are visible for this month. Bookmark the link to know the future rise/set times for your exact location (just type in your ZIP Code).
Randy KD9VBE again touted the wonders and utility of the program Stellarium, the open-source astronomy program, which one can download for free, is great to use, to know ahead of time what one can see in the sky, and, in real time.
On lunar activity:
By the next Astro Net, the Moon will be known as the Full Flower Moon in May, the folklore name for the Full Moon during that month, as we anticipate that this month's April showers will bring May flowers.
On meteor activity:
Like in the previous installment of the Astro Net, Roy KD9RSE alerted listeners again this time to the prospect of seeing the Lyrid meteor shower this month (dates and times at that link). While the small constellation of Lyra (the Harp) is the radiant for this shower, look for up to 20 meteors per hour, if the weather is clear; the light of the waxing crescent Moon will not likely interfere with observing meteors. As posted in the previous Astro Net, here's a list of upcoming showers this calendar year.
On other items:
In a roundup of comments from check-ins by Glenn KD9PNY, several additional comments came up for discussion.
Briar KD9TFA asked how one might protect a radio rig from excess solar activity, perhaps with something akin to a Faraday cage. As Roy KD9RSE noted that there might be several ways to do this, perhaps at this link or at this link. Advanced methods can involve hardening or more protection (at this link), say, from an EMP (which would likely have the same effect as a CME).
Dan K9SGA mentioned how he'd like to get his telescope up and running; so, here are items on telescope use in general at this link, or at this link on using a 'scope, and at this link for doing some inexpensive repair, if needed.
The Astro Net closed with thanks to all who check in regularly, and, to those who listen to the Net on RadioReference.com.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
NI9K Nick
KA9EFD Allan
KD9VBE Randy
KD9TFA Briar
K9QKE Tim
KD9QJG Don
K9SGA Dan
W9ABN Ed
KD9WTJ Sarah
The Astro Net airs every second and fourth full week of each month, on Wednesday of those weeks. Tune in to the next Astro Net on Wednesday, May 10, 2023, at 8:00 p.m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
On solar activity:
Roy KD9RSE and Glenn KD9PNY updated check-ins and listeners on recent solar indices that seem unfavorable for radio propagation. While we as amateur radio operators are always on the look-out for solar activity that can affect radio propagation, it is good to know the effects of that activity. So, solar flares and coronal mass ejections (CME) are those solar activities that can be the most concerning to us. Both solar flares and CMEs are described at this link. Their effects can be problematic (as outlined at this link) or potentially devastating (as described at this link).
While the blast of light from the initial flare leaves the Sun at the speed of light, the high-energy particles accompanying a flare may travel more slowly and would then arrive (say, at Earth) some minutes later; a CME is a more massive explosion of the Sun's atmosphere (called the corona) that lifts off the surface of the Sun and is hurled in outer space, and it may take a couple days to arrive. Various online outlets will post real-time or delayed-play images of the Sun, such at Spacweather.com (at this link) or from NASA's SOHO spacecraft (at this link and at this link for various wavelengths).
For us on Earth, one result of solar activity can be the display of the Aurora Borealis (the Northern Lights, at this link); by contrast, at the same time, a mirror-image of the northern lights is seen as the Auroral Australis (the Southern Lights, at this link).
On planet activity:
Over the past several Nets, Glenn KD9PNY and Roy KD9RSE have reported on the position and visibility of various planets this month. Brilliant Venus still dominates the early evening sky throughout the month of April. Mars (near the reddish star Aldebaran in Taurus, the Bull) continues to gleam in the night sky, setting a couple hours after Venus, or, after midnight. Saturn rises ahead of the Sun in morning twilight. Find these planet positions on charts at this link.
At this link, also posted in the previous installments of the Astro Net recap, is a list of times at which the planets are visible for this month. Bookmark the link to know the future rise/set times for your exact location (just type in your ZIP Code).
Randy KD9VBE again touted the wonders and utility of the program Stellarium, the open-source astronomy program, which one can download for free, is great to use, to know ahead of time what one can see in the sky, and, in real time.
On lunar activity:
By the next Astro Net, the Moon will be known as the Full Flower Moon in May, the folklore name for the Full Moon during that month, as we anticipate that this month's April showers will bring May flowers.
On meteor activity:
Like in the previous installment of the Astro Net, Roy KD9RSE alerted listeners again this time to the prospect of seeing the Lyrid meteor shower this month (dates and times at that link). While the small constellation of Lyra (the Harp) is the radiant for this shower, look for up to 20 meteors per hour, if the weather is clear; the light of the waxing crescent Moon will not likely interfere with observing meteors. As posted in the previous Astro Net, here's a list of upcoming showers this calendar year.
On other items:
In a roundup of comments from check-ins by Glenn KD9PNY, several additional comments came up for discussion.
Briar KD9TFA asked how one might protect a radio rig from excess solar activity, perhaps with something akin to a Faraday cage. As Roy KD9RSE noted that there might be several ways to do this, perhaps at this link or at this link. Advanced methods can involve hardening or more protection (at this link), say, from an EMP (which would likely have the same effect as a CME).
Dan K9SGA mentioned how he'd like to get his telescope up and running; so, here are items on telescope use in general at this link, or at this link on using a 'scope, and at this link for doing some inexpensive repair, if needed.
The Astro Net closed with thanks to all who check in regularly, and, to those who listen to the Net on RadioReference.com.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
NI9K Nick
KA9EFD Allan
KD9VBE Randy
KD9TFA Briar
K9QKE Tim
KD9QJG Don
K9SGA Dan
W9ABN Ed
KD9WTJ Sarah
The Astro Net airs every second and fourth full week of each month, on Wednesday of those weeks. Tune in to the next Astro Net on Wednesday, May 10, 2023, at 8:00 p.m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
Astro Net recap, for April 12, 2023
Highlights from on-the-air ham radio transmission on 147.045 MHz
For the 22nd installment of the Astro Net on 4/12/2023, here is a summary (not a transcript) of various topics that check-ins had the chance to discuss on-the-air.
On solar activity:
Roy KD9RSE and Glenn KD9PNY updated check-ins and listeners on recent solar indices that seem favorable for radio propagation. Though total solar flux was up and down over the past week, the recent value for SFI, as in previous weeks, indicates a fairly favorable radio propagation.
Allan KA9EFD asked about an eclipse this month, which indeed there is, but not within the KA9QJG repeater's coverage; that is, a rare "hybrid" eclipse will occur, but will be visible across parts of the Pacific and Indian Oceans. It's rare, since it shows two kinds of eclipses in the same pass of the Moon's shadow over Earth; that is, for part of the eclipse, the Moon blots out the Sun completely, whereas for another part, the Moon appears smaller than the disk of the Sun, which results in a ring of sunlight.
From this, the Net launched into an extended discussion about the solar eclipse to occur on April 8, 2024, which will be visible through part of this repeater's coverage. Several items to note: any look at the Sun can be deadly to the eyes; however, during that brief period of time during which the Moon completely blots out the disk of the Sun during a total solar eclipse, one can quickly view this phenomenon of nature. Of course, NEVER look at the Sun directly through any optical aid, such as with a binocular, a telescope, or even an opera glass.
Looking at the Sun, prior to or after totality, through a #14 welding glass, may be possible, but only briefly. Alternatively, without looking toward the Sun, one can also safely project the "crescent Sun", prior to or after totality, through a pinhole in paper, or observe crescent Suns on the ground as sunlight filters past the leaves of trees. Plan now for where one might want to visit along the path of totality, as nearly any location along that path will be jammed with traffic and observers.
On planet activity:
Over the past several Nets, Glenn KD9PNY and Roy KD9RSE have reported on the position and visibility of various planets this month. Mighty Jupiter, formerly bright near the western horizon after sunset last month, has crossed into the morning sky, but is lost in the glare of the rising Sun till the end of this month.
Brilliant Venus still dominates the early evening sky throughout the month of April. Mars (near the reddish star Aldebaran in Taurus, the Bull) continues its march across the night sky, positioned nearly at the zenith at sundown; Mars sets a couple hours after Venus, or, after midnight. Saturn emerges into the morning sky by month's end, rising ahead of the Sun. Find these planet positions on charts at this link.
At this link, also posted in the previous installment of the Astro Net recap, is a list of times at which the planets are visible for this month. Bookmark the link to know the future rise/set times for your exact location (just type in your ZIP Code).
Randy KD9VBE also indicated that the program Stellarium, the open-source astronomy program, which one can download for free, is great to use, to know ahead of time what one can see in the sky, and, in real time.
On lunar activity:
Known as the Full Pink Moon in April, the folklore name for the Full Moon this month comes from the spread of pink ground cover, known as phlox, that blooms in early Spring. In other folklore, one can foretell approaching rainy weather by a faint ring around the Moon, a Moon halo, which can often indicate the approach of precipitation, for which April is often known.
On meteor activity:
Roy KD9RSE alerted listeners to the prospect of seeing the Lyrid meteor shower this month (dates and times at that link). While the small constellation of Lyra (the Harp) is the radiant for this shower, look for up to 20 meteors per hour, if the weather is clear; the light of the waxing crescent Moon will not likely interfere with observing meteors. Here's a list of upcoming showers this calendar year.
On other items:
Bill KC9MDS sought to know the size of the distant star Betelguese, which he'd read was as wide as (at least) as the orbit of Earth. Indeed, the star's diameter appears to be even wider than that.
Don KA9QJG asked the Net for a moment of silence at the passing of Bill N9QLS, a long-time ham-radio enthusiast and now a silent key, who, up until recently, had occasion to visit this repeater's Tech Net and Astro Net.
Don KA9QJG included the latest podcast from Dr. Tamitha Skov, the Space Weather Woman, who delivered her own report about the prospect for possible solar flares that could be aimed in our direction in the coming days.
The Astro Net closed with thanks to all who check in regularly, and, to those who listen to the Net on RadioReference.com.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KC9MDS Bill
KA9EFD Allan
KD9TFA Briar
W9ABN Ed
KD9PNY Glenn
KD9QJG Don
KD9PNS Karl
KD9VBE Randy
KC9ER Ricky (Enrique)
The Astro Net airs every second and fourth full week of each month, on Wednesday of those weeks. Tune in to the next Astro Net on Wednesday, April 26, 2023, at 8:00 p.m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
On solar activity:
Roy KD9RSE and Glenn KD9PNY updated check-ins and listeners on recent solar indices that seem favorable for radio propagation. Though total solar flux was up and down over the past week, the recent value for SFI, as in previous weeks, indicates a fairly favorable radio propagation.
Allan KA9EFD asked about an eclipse this month, which indeed there is, but not within the KA9QJG repeater's coverage; that is, a rare "hybrid" eclipse will occur, but will be visible across parts of the Pacific and Indian Oceans. It's rare, since it shows two kinds of eclipses in the same pass of the Moon's shadow over Earth; that is, for part of the eclipse, the Moon blots out the Sun completely, whereas for another part, the Moon appears smaller than the disk of the Sun, which results in a ring of sunlight.
From this, the Net launched into an extended discussion about the solar eclipse to occur on April 8, 2024, which will be visible through part of this repeater's coverage. Several items to note: any look at the Sun can be deadly to the eyes; however, during that brief period of time during which the Moon completely blots out the disk of the Sun during a total solar eclipse, one can quickly view this phenomenon of nature. Of course, NEVER look at the Sun directly through any optical aid, such as with a binocular, a telescope, or even an opera glass.
Looking at the Sun, prior to or after totality, through a #14 welding glass, may be possible, but only briefly. Alternatively, without looking toward the Sun, one can also safely project the "crescent Sun", prior to or after totality, through a pinhole in paper, or observe crescent Suns on the ground as sunlight filters past the leaves of trees. Plan now for where one might want to visit along the path of totality, as nearly any location along that path will be jammed with traffic and observers.
On planet activity:
Over the past several Nets, Glenn KD9PNY and Roy KD9RSE have reported on the position and visibility of various planets this month. Mighty Jupiter, formerly bright near the western horizon after sunset last month, has crossed into the morning sky, but is lost in the glare of the rising Sun till the end of this month.
Brilliant Venus still dominates the early evening sky throughout the month of April. Mars (near the reddish star Aldebaran in Taurus, the Bull) continues its march across the night sky, positioned nearly at the zenith at sundown; Mars sets a couple hours after Venus, or, after midnight. Saturn emerges into the morning sky by month's end, rising ahead of the Sun. Find these planet positions on charts at this link.
At this link, also posted in the previous installment of the Astro Net recap, is a list of times at which the planets are visible for this month. Bookmark the link to know the future rise/set times for your exact location (just type in your ZIP Code).
Randy KD9VBE also indicated that the program Stellarium, the open-source astronomy program, which one can download for free, is great to use, to know ahead of time what one can see in the sky, and, in real time.
On lunar activity:
Known as the Full Pink Moon in April, the folklore name for the Full Moon this month comes from the spread of pink ground cover, known as phlox, that blooms in early Spring. In other folklore, one can foretell approaching rainy weather by a faint ring around the Moon, a Moon halo, which can often indicate the approach of precipitation, for which April is often known.
On meteor activity:
Roy KD9RSE alerted listeners to the prospect of seeing the Lyrid meteor shower this month (dates and times at that link). While the small constellation of Lyra (the Harp) is the radiant for this shower, look for up to 20 meteors per hour, if the weather is clear; the light of the waxing crescent Moon will not likely interfere with observing meteors. Here's a list of upcoming showers this calendar year.
On other items:
Bill KC9MDS sought to know the size of the distant star Betelguese, which he'd read was as wide as (at least) as the orbit of Earth. Indeed, the star's diameter appears to be even wider than that.
Don KA9QJG asked the Net for a moment of silence at the passing of Bill N9QLS, a long-time ham-radio enthusiast and now a silent key, who, up until recently, had occasion to visit this repeater's Tech Net and Astro Net.
Don KA9QJG included the latest podcast from Dr. Tamitha Skov, the Space Weather Woman, who delivered her own report about the prospect for possible solar flares that could be aimed in our direction in the coming days.
The Astro Net closed with thanks to all who check in regularly, and, to those who listen to the Net on RadioReference.com.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KC9MDS Bill
KA9EFD Allan
KD9TFA Briar
W9ABN Ed
KD9PNY Glenn
KD9QJG Don
KD9PNS Karl
KD9VBE Randy
KC9ER Ricky (Enrique)
The Astro Net airs every second and fourth full week of each month, on Wednesday of those weeks. Tune in to the next Astro Net on Wednesday, April 26, 2023, at 8:00 p.m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
Note: No Astro Net recap for March 22, 2023
Highlights from on-the-air ham radio transmission on 147.045 MHz
No installment of the Astro Net on 3/22/2022. The KA9QJG repeater was offline recently for needed replacement of a faulty power supply. Due to that upgrade (still in progress as of this date), the Astro Net is anticipated to resume in two weeks; that is, during the second full week of next month, on April 12.
Update: As of 3/26/2023, the KA9QJG repeater appears to be back online.
Update: As of 3/26/2023, the KA9QJG repeater appears to be back online.
Astro Net recap, for March 8, 2023
Highlights from on-the-air ham radio transmission on 147.045 MHz
For the 21st installment of the Astro Net on 3/8/2023, here is a summary (not a transcript) of various topics that check-ins had the chance to discuss on-the-air.
On solar activity:
Roy KD9RSE and Glenn KD9PNY updated check-ins and listeners on recent solar indices that seem favorable for radio propagation, and, that a major solar flare erupted this past week. Though total solar flux was up and down over the past week, the recent value for SFI, as in previous weeks, gave a good indication of fairly favorable radio propagation. Evidently, the flare made for spectacular auroral displays at high latitudes.
On planet activity:
Like last time on the Net, Glenn KD9PNY and Roy KD9RSE led with a report on the position and visibility of various planets this month. Jupiter (bright though low to the horizon) and Venus (brilliant just after sunset) came close this past week for a planetary conjunction, and, Mars (near the reddish star Aldebaran in Taurus, the Bull) continues its march across the night sky. Find these planet positions on charts at this link.
Saturn (low to the west after sunset) is lost in the glare of the Sun, but will emerge into our morning sky by month's end. At this link, also posted in the previous installment of the Astro Net recap, is a list of times at which the planets are visible for this month. Bookmark the link to know the future rise/set times for your exact location (just type in your ZIP Code).
On lunar activity:
Several check-ins reported seeing the Full Moon in the past day, looking large as it rises. Known as the Full Worm Moon this month, the Moon may appear huge as one views it at its rising; later in the night, as the Moon appears higher in the sky, it may appear smaller than at its rising. That is, on rising, the Moon, as seen just above treetops or between buildings, simply appears large in relation to objects near the horizon or in the foreground. The Moon doesn't actually change in size, it just appears to do so.
Also, on rising, the Moon (and the Sun) can appear tinged orange (or reddish) in color. This effect is due to dust in the air and the air itself that filters most of the light from Moon (or Sun), allowing the longer, reddish wavelengths to reach the eye, hence the warm hue.
As a prominent object in the sky, even on a hazy night with filmy clouds, the Full Moon, as seen through that film, can foretell approaching weather (at least in common folklore); that is, a faint ring around the Moon, a Moon halo, can often indicate the approach of precipitation.
Randy KD9VBE pointed out that, by his use of Stellarium, the open-source astronomy program, at its angle as seen in the sky that night, a "smiley face" crescent Moon will be visible on March 28.
On one particular phenomenon in the sky:
As Glenn KD9PNY reminded check-ins of the astronomical start of Spring on March 20 this year with the Vernal Equinox, Roy KD9RSE alerted check-ins to the prospect of seeing of the zodiacal light at this time of year. At the equinoxes, the angle of our earthly view to the plane of the Solar System (aka the ecliptic) allows us to see sunlight in outer space reflect from dust in that plane. As seen from Earth, that lit-up space dust appears as a faint wedge of light that can be seen after sunset around the equinox in Spring and before dawn around the equinox in Autumn. A dark sky, away from city lights, aids its view.
On other items:
Bill KC9MDS sought to know any significance of a sky phenomenon that may have presaged, or is historically linked to, Hannibal's march across the Alps. Whether there was an actual astronomical phenomenon linked to this historical event, the Astro Net cannot confirm. However, there is a relatively well-known work of sky art, depicting a representation of this historical event of Hannibal's crossing, by a Victorian painter, J. M. W. Turner, at this link, that does portray an ominous snowstorm obscuring the Sun. As an aside, too, there is some interesting history about how Hannibal's actual battlefield was found (by a military historian), at which Hannibal fought prior to his famous alpine trek.
Don KA9QJG asked about the cause of the sound of "rolling thunder"; that is, the long, low, ongoing rumble during a thunderstorm. This sound effect is most often due to a heated shock wave expanding through the air, as initiated by a long arc of lightning, which creates the long, low, rolling rumble of thunder, that, too, can echo off the landscape.
On another topic of UAPs (aka UFOs previously), Don KA9QJG also played a recording about a Harvard scientist, Avi Loeb, who has sought to identify the actual atmospheric constraints on the flight of such alleged sky objects in an unpublished paper, to understand these phenomena and their possible origin. This is not the first time that Dr. Loeb has ventured forth about UAPs and UFOs, as he has voiced previous speculation publicly, even to be called on, as he himself reports, to assist in identifying possible UAPs over Ukraine.
Concerning Don's subsequent questions about the prominence of Harvard University and its frequent mention in various news stories, Roy KD9RSE noted that the august institution, known in the early 20th century as Harvard College, once only allowed women to be employed as "computers" to assist its male faculty. Demonstrating their consistent ability to produce good results, a number of women were employed by the Harvard Observatory, since they were so adept at mathematical calculation, the ability of which was not often commended to women at the time.
Glenn KD9PNY added to these remarks by reminding all check-ins that this date (today) of the Astro Net coincided with International Women's Day, to which he added that women significantly assisted the first manned launch of John Glenn to orbit, and, that many women have contributed to the advance of space flight.
The Astro Net closed with thanks to all who check in regularly and to those who listen to the Net on RadioReference.com.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KC9MDS Bill
W9JOM Jim
KA9EFD Allan
KD9EJE Shad
KD9IQU Nick
KD9TFA Briar
KD9QJG Don
KD9AQO Brian
KD9VBE Randy
KC9AZ Lonzo
N9IQ Steve
The Astro Net airs every second and fourth full week of each month, on Wednesday of those weeks. Tune in to the next Astro Net on Wednesday, March 22, 2023, at 8:00 p.m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
On solar activity:
Roy KD9RSE and Glenn KD9PNY updated check-ins and listeners on recent solar indices that seem favorable for radio propagation, and, that a major solar flare erupted this past week. Though total solar flux was up and down over the past week, the recent value for SFI, as in previous weeks, gave a good indication of fairly favorable radio propagation. Evidently, the flare made for spectacular auroral displays at high latitudes.
On planet activity:
Like last time on the Net, Glenn KD9PNY and Roy KD9RSE led with a report on the position and visibility of various planets this month. Jupiter (bright though low to the horizon) and Venus (brilliant just after sunset) came close this past week for a planetary conjunction, and, Mars (near the reddish star Aldebaran in Taurus, the Bull) continues its march across the night sky. Find these planet positions on charts at this link.
Saturn (low to the west after sunset) is lost in the glare of the Sun, but will emerge into our morning sky by month's end. At this link, also posted in the previous installment of the Astro Net recap, is a list of times at which the planets are visible for this month. Bookmark the link to know the future rise/set times for your exact location (just type in your ZIP Code).
On lunar activity:
Several check-ins reported seeing the Full Moon in the past day, looking large as it rises. Known as the Full Worm Moon this month, the Moon may appear huge as one views it at its rising; later in the night, as the Moon appears higher in the sky, it may appear smaller than at its rising. That is, on rising, the Moon, as seen just above treetops or between buildings, simply appears large in relation to objects near the horizon or in the foreground. The Moon doesn't actually change in size, it just appears to do so.
Also, on rising, the Moon (and the Sun) can appear tinged orange (or reddish) in color. This effect is due to dust in the air and the air itself that filters most of the light from Moon (or Sun), allowing the longer, reddish wavelengths to reach the eye, hence the warm hue.
As a prominent object in the sky, even on a hazy night with filmy clouds, the Full Moon, as seen through that film, can foretell approaching weather (at least in common folklore); that is, a faint ring around the Moon, a Moon halo, can often indicate the approach of precipitation.
Randy KD9VBE pointed out that, by his use of Stellarium, the open-source astronomy program, at its angle as seen in the sky that night, a "smiley face" crescent Moon will be visible on March 28.
On one particular phenomenon in the sky:
As Glenn KD9PNY reminded check-ins of the astronomical start of Spring on March 20 this year with the Vernal Equinox, Roy KD9RSE alerted check-ins to the prospect of seeing of the zodiacal light at this time of year. At the equinoxes, the angle of our earthly view to the plane of the Solar System (aka the ecliptic) allows us to see sunlight in outer space reflect from dust in that plane. As seen from Earth, that lit-up space dust appears as a faint wedge of light that can be seen after sunset around the equinox in Spring and before dawn around the equinox in Autumn. A dark sky, away from city lights, aids its view.
On other items:
Bill KC9MDS sought to know any significance of a sky phenomenon that may have presaged, or is historically linked to, Hannibal's march across the Alps. Whether there was an actual astronomical phenomenon linked to this historical event, the Astro Net cannot confirm. However, there is a relatively well-known work of sky art, depicting a representation of this historical event of Hannibal's crossing, by a Victorian painter, J. M. W. Turner, at this link, that does portray an ominous snowstorm obscuring the Sun. As an aside, too, there is some interesting history about how Hannibal's actual battlefield was found (by a military historian), at which Hannibal fought prior to his famous alpine trek.
Don KA9QJG asked about the cause of the sound of "rolling thunder"; that is, the long, low, ongoing rumble during a thunderstorm. This sound effect is most often due to a heated shock wave expanding through the air, as initiated by a long arc of lightning, which creates the long, low, rolling rumble of thunder, that, too, can echo off the landscape.
On another topic of UAPs (aka UFOs previously), Don KA9QJG also played a recording about a Harvard scientist, Avi Loeb, who has sought to identify the actual atmospheric constraints on the flight of such alleged sky objects in an unpublished paper, to understand these phenomena and their possible origin. This is not the first time that Dr. Loeb has ventured forth about UAPs and UFOs, as he has voiced previous speculation publicly, even to be called on, as he himself reports, to assist in identifying possible UAPs over Ukraine.
Concerning Don's subsequent questions about the prominence of Harvard University and its frequent mention in various news stories, Roy KD9RSE noted that the august institution, known in the early 20th century as Harvard College, once only allowed women to be employed as "computers" to assist its male faculty. Demonstrating their consistent ability to produce good results, a number of women were employed by the Harvard Observatory, since they were so adept at mathematical calculation, the ability of which was not often commended to women at the time.
Glenn KD9PNY added to these remarks by reminding all check-ins that this date (today) of the Astro Net coincided with International Women's Day, to which he added that women significantly assisted the first manned launch of John Glenn to orbit, and, that many women have contributed to the advance of space flight.
The Astro Net closed with thanks to all who check in regularly and to those who listen to the Net on RadioReference.com.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KC9MDS Bill
W9JOM Jim
KA9EFD Allan
KD9EJE Shad
KD9IQU Nick
KD9TFA Briar
KD9QJG Don
KD9AQO Brian
KD9VBE Randy
KC9AZ Lonzo
N9IQ Steve
The Astro Net airs every second and fourth full week of each month, on Wednesday of those weeks. Tune in to the next Astro Net on Wednesday, March 22, 2023, at 8:00 p.m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
Astro Net recap, for February 22, 2023
Highlights from on-the-air ham radio transmission on 147.045 MHz
For the 20th installment of the Astro Net on 2/22/2023, here is a summary (not a transcript) of various topics that check-ins had the chance to discuss on-the-air.
On our new time:
Glenn KD9PNY and Roy KD9RSE confirmed the Astro Net at its new time, namely, 8:00 p. m. (local time).
On solar activity:
Roy KD9RSE updated check-ins and listeners on recent solar indices that seem favorable for radio propagation. Though total solar flux was up and down over the past week, the recent value for SFI gave a good indication of fairly favorable radio propagation.
Glenn KD9PNY alerted listeners that Dr. Tamitha Skov, the Space Weather Woman, held a live-stream program this past weekend on causes and explanations of recent solar flare activity, and, he participated in the program with questions for Dr. Skov (who is also an amateur radio operator).
This new format for this particular program was much lengthier and separate from Dr. Skov's usual updates. Glenn KD9RSE provided this link, at which you can view her entire live-stream program, unedited.
On planet activity:
Like last time on the Net, Glenn KD9PNY and Roy KD9RSE led with a report on the position and visibility of various planets this month, similar to previous Astro Nets that described Jupiter (high and bright through midnight), Venus (brilliant just after sunset), and Mars (near the reddish star Aldebaran in Taurus, the Bull). Saturn (low to the west after sunset) is lost in the glare of the Sun. At this link is a list of times at which the planets are visible for this month. Bookmark the link to know the future rise/set times for your exact location (just type in your ZIP Code).
On one particular upcoming event:
Roy KD9RSE asked check-ins to begin to consider plans for the total solar eclipse that will be visible (across the range of the KA9QJG repeater) on April 8, 2024. Though the eclipse is more than a year away, the event may need planning, if one wants to travel to the best spot within the range of the repeater to observe this spectacular celestial event.
Also, from a practical perspective, one may want to plan to practice propagation or to take pictures during the short duration of the eclipse. One will also want to find good routes to travel to and from your chosen site, as likely there will be traffic jams on interstate routes and county roads close to eclipse's centerline. At this link are maps of the eclipse's centerline across the country for April 8, 2024, so you can plan your own route and location.
Observing the eclipse can be done safely. For example, one can use a welder's plate (#14) to glance at the Sun to note the progress of the Moon as it encroaches upon the disk of the Sun, prior to totality. This will allow you to see the diminishing crescent of the Sun as the Moon's disk covers the disk of the Sun. (At this link are other safety tips.)
Other safe methods to observe the solar eclipse include making a pinhole box (at this link), using your hands (at this link), or looking at solar crescents made by trees (at this link).
Why is this event so special? Because this kind of line-up happens nowhere else in the Solar System. That is, nowhere can one stand on a planet's surface and see this perfect fit of a moon disk covering completely the Sun's disk. Other planets have moons, but their "eclipses" don't occur for one to see those moons completely cover the Sun while standing on that planet's surface. An explanation of that appears at this link.
On other items:
Don KD9QJG had several questions for the Astro Net, including some of the effects of the Sun on weather and climate. As the Sun drives both weather and climate on this planet, which is summarized at this link, there is a difference between weather and climate.
That is, singular weather events (however devastating they can be) do not necessarily portend a trend toward a particular direction of climate change (such as warming or cooling); however, there are those (such as at this link) who will argue that all extreme weather is evidence of climate change and that climate change causes extreme weather. (This sounds suspiciously like circular reasoning, and, some of the predictions at that link, above, are based on past computer modeling, which, at the link, below, has proved recently to be largely inaccurate).
Good science in this area seeks to detail the nuances of how and why climate can change, the direction of which is not entirely in our control; for example, on a long-term astronomical scale, there are several persistent, natural forces at work that can alter (and have altered) climate, all without human intervention. By contrast, bad science (or at least inexpert climate modeling) in this area sometimes raises alarm about events that have little certainty to occur.
By the way, in closing this Net for the night, if one wants to be certain about what you see in the night sky, choose the optical aid that best suits your needs; at this link one can find a comparison of optics from which the amateur astronomer or casual observer can choose.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KD9OIQ Tony
KD9QJG Don
KC9ER Ricky
The Astro Net airs every second and fourth full week of each month, on Wednesday of those weeks. Tune in to the next Astro Net on Wednesday, March 8, 2023, at 8:00 p.m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
On our new time:
Glenn KD9PNY and Roy KD9RSE confirmed the Astro Net at its new time, namely, 8:00 p. m. (local time).
On solar activity:
Roy KD9RSE updated check-ins and listeners on recent solar indices that seem favorable for radio propagation. Though total solar flux was up and down over the past week, the recent value for SFI gave a good indication of fairly favorable radio propagation.
Glenn KD9PNY alerted listeners that Dr. Tamitha Skov, the Space Weather Woman, held a live-stream program this past weekend on causes and explanations of recent solar flare activity, and, he participated in the program with questions for Dr. Skov (who is also an amateur radio operator).
This new format for this particular program was much lengthier and separate from Dr. Skov's usual updates. Glenn KD9RSE provided this link, at which you can view her entire live-stream program, unedited.
On planet activity:
Like last time on the Net, Glenn KD9PNY and Roy KD9RSE led with a report on the position and visibility of various planets this month, similar to previous Astro Nets that described Jupiter (high and bright through midnight), Venus (brilliant just after sunset), and Mars (near the reddish star Aldebaran in Taurus, the Bull). Saturn (low to the west after sunset) is lost in the glare of the Sun. At this link is a list of times at which the planets are visible for this month. Bookmark the link to know the future rise/set times for your exact location (just type in your ZIP Code).
On one particular upcoming event:
Roy KD9RSE asked check-ins to begin to consider plans for the total solar eclipse that will be visible (across the range of the KA9QJG repeater) on April 8, 2024. Though the eclipse is more than a year away, the event may need planning, if one wants to travel to the best spot within the range of the repeater to observe this spectacular celestial event.
Also, from a practical perspective, one may want to plan to practice propagation or to take pictures during the short duration of the eclipse. One will also want to find good routes to travel to and from your chosen site, as likely there will be traffic jams on interstate routes and county roads close to eclipse's centerline. At this link are maps of the eclipse's centerline across the country for April 8, 2024, so you can plan your own route and location.
Observing the eclipse can be done safely. For example, one can use a welder's plate (#14) to glance at the Sun to note the progress of the Moon as it encroaches upon the disk of the Sun, prior to totality. This will allow you to see the diminishing crescent of the Sun as the Moon's disk covers the disk of the Sun. (At this link are other safety tips.)
Other safe methods to observe the solar eclipse include making a pinhole box (at this link), using your hands (at this link), or looking at solar crescents made by trees (at this link).
Why is this event so special? Because this kind of line-up happens nowhere else in the Solar System. That is, nowhere can one stand on a planet's surface and see this perfect fit of a moon disk covering completely the Sun's disk. Other planets have moons, but their "eclipses" don't occur for one to see those moons completely cover the Sun while standing on that planet's surface. An explanation of that appears at this link.
On other items:
Don KD9QJG had several questions for the Astro Net, including some of the effects of the Sun on weather and climate. As the Sun drives both weather and climate on this planet, which is summarized at this link, there is a difference between weather and climate.
That is, singular weather events (however devastating they can be) do not necessarily portend a trend toward a particular direction of climate change (such as warming or cooling); however, there are those (such as at this link) who will argue that all extreme weather is evidence of climate change and that climate change causes extreme weather. (This sounds suspiciously like circular reasoning, and, some of the predictions at that link, above, are based on past computer modeling, which, at the link, below, has proved recently to be largely inaccurate).
Good science in this area seeks to detail the nuances of how and why climate can change, the direction of which is not entirely in our control; for example, on a long-term astronomical scale, there are several persistent, natural forces at work that can alter (and have altered) climate, all without human intervention. By contrast, bad science (or at least inexpert climate modeling) in this area sometimes raises alarm about events that have little certainty to occur.
By the way, in closing this Net for the night, if one wants to be certain about what you see in the night sky, choose the optical aid that best suits your needs; at this link one can find a comparison of optics from which the amateur astronomer or casual observer can choose.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KD9OIQ Tony
KD9QJG Don
KC9ER Ricky
The Astro Net airs every second and fourth full week of each month, on Wednesday of those weeks. Tune in to the next Astro Net on Wednesday, March 8, 2023, at 8:00 p.m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
Astro Net recap, for February 8, 2023
Highlights from on-the-air ham radio transmission on 147.045 MHz
For the 19th installment of the Astro Net on 2/8/2023, here is a summary (not a transcript) of various topics that check-ins had the chance to discuss on-the-air.
On a new time:
Glenn KD9PNY and Roy KD9RSE introduced the Astro Net at its new time, namely, 8:00 p. m. (local time).
On solar activity:
Glenn KD9PNY updated check-ins and listeners on recent solar indices that seem favorable for radio propagation. Though total solar flux has been variable in recent days, its relatively high, recent value (say, for SFI) still tends to favor propagation on most of the popular ham bands. As in the previous Astro Net, Glenn KD9PNY alerted listeners that Dr. Tamitha Skov, the Space Weather Woman, has released information information that describes several, recent solar flares this past week. Don KA9QJG played that recent update on-the-air.
On planet activity:
Glenn KD9PNY and Roy KD9RSE also reported on the position and visibility of various planets this month, similar to the previous Astro Net that described Jupiter (high and bright through midnight), Venus (brilliant just after sunset), and Mars (near the reddish star Aldebaran in Taurus, the Bull). Saturn (low to the west after sunset) is lost in the glare of the Sun.
Don KA9QJG asked about the usefulness of virtual-reality headsets or the availability of online applications to observe or monitor the night sky, say, to identify planets. In response, Roy KD9RSE and other check-ins touted the usefulness of an open-source program known as Stellarium, which allows the user a download that can be customized to one's location, viewing preferences, and objects observed. That is, one can set up Stellarium to observe the sky, day or night, from any point on Earth, at any time in history (or as can be seen from Earth far into the future). Randy KD9VBE was especially enthused with Stellarium, noting its ability to track satellites and that it had many catalogues of astronomical objects.
The program has a variety of interesting features that allows the highlight and tracking of celestial objects. For example, one can also zoom in, as if using a telescope, to get a close-up view of your favorite object. A download of the Stellarium program is available at this link. (In addition, a sub-group has been started in this repeater's news group, to discuss the detail and the fun one can have with Stellarium.)
On other items:
Several check-ins wondered about the use and safety of optical aid to view the night sky. At this link one can find a comparison of optics from which the amateur astronomer or casual observer can choose.
Bill KC9MDS asked about kinds of solar activity, namely, solar flares and coronal mass ejections (aka CME) that affect radio propagation. At this link is a comparison of these solar phenomena; at this link are some of the effects of these phenomena, such as auroras (aka Aurora Borealis, or the Northern Lights). A CME is a solar storm that can be especially significant for Earth; it is believed that a particularly strong CME hit Earth in 1859, since then known as the Carrington Event.
Bill KC9MDS also asked about any other solar effects on the Earth, other than auroras and disruptions in radio propagation, and, whether the Sun can influence or cause earthquakes. In response, Roy KD9RSE indicated that here have been studies, both simple and more involved, in an attempt to answer this conclusively.
Brandon K9PZ offered that some recent research has tried to establish a connection between solar flares and earthquakes; that is, though the connection of solar activity and earthquakes is not well established, some electromagnetic anomalies contemporaneous with earthquakes have been observed and recorded along with coincident solar activity, which seems to suggest a connection. Popular outlets for astronomy news have picked up this theme, too, here; though, sources of information for geologic activity on Earth do not agree that there is a connection. No doubt more work is needed in this area.
Of course, when observing the Sun, one should take great care to avoid eye damage (and never look through a scope or binocular at the Sun). Roy KD9RSE asked check-ins to begin to consider plans for the total solar eclipse that will be visible (across the range of the repeater) on April 8, 2024. For example, one can safely use a welder's plate (#14) to glance at the Sun to note the progress of the Moon as it encroaches upon the disk of the Sun, prior to totality.
Don KD9QJG had several parting questions for the Astro Net, such as how the eye works and the origin of an eye floater; at this link, too, is a brief medical description of this condition that can afflict the eye. He also asked check-ins to guess the weight of a rain cloud (the answer to which is found here).
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KC9MDS Bill
KD9VBE Randy
KD9QJG Don
KD9HOK Greg
NI9K Nick
KK9F Al
K9PZ Brandon (check-in via text)
The Astro Net airs every second and fourth full week of each month, on Wednesday of those weeks. Tune in to the next Astro Net on Wednesday, February 22, 2023, at 8:00 p.m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
On a new time:
Glenn KD9PNY and Roy KD9RSE introduced the Astro Net at its new time, namely, 8:00 p. m. (local time).
On solar activity:
Glenn KD9PNY updated check-ins and listeners on recent solar indices that seem favorable for radio propagation. Though total solar flux has been variable in recent days, its relatively high, recent value (say, for SFI) still tends to favor propagation on most of the popular ham bands. As in the previous Astro Net, Glenn KD9PNY alerted listeners that Dr. Tamitha Skov, the Space Weather Woman, has released information information that describes several, recent solar flares this past week. Don KA9QJG played that recent update on-the-air.
On planet activity:
Glenn KD9PNY and Roy KD9RSE also reported on the position and visibility of various planets this month, similar to the previous Astro Net that described Jupiter (high and bright through midnight), Venus (brilliant just after sunset), and Mars (near the reddish star Aldebaran in Taurus, the Bull). Saturn (low to the west after sunset) is lost in the glare of the Sun.
Don KA9QJG asked about the usefulness of virtual-reality headsets or the availability of online applications to observe or monitor the night sky, say, to identify planets. In response, Roy KD9RSE and other check-ins touted the usefulness of an open-source program known as Stellarium, which allows the user a download that can be customized to one's location, viewing preferences, and objects observed. That is, one can set up Stellarium to observe the sky, day or night, from any point on Earth, at any time in history (or as can be seen from Earth far into the future). Randy KD9VBE was especially enthused with Stellarium, noting its ability to track satellites and that it had many catalogues of astronomical objects.
The program has a variety of interesting features that allows the highlight and tracking of celestial objects. For example, one can also zoom in, as if using a telescope, to get a close-up view of your favorite object. A download of the Stellarium program is available at this link. (In addition, a sub-group has been started in this repeater's news group, to discuss the detail and the fun one can have with Stellarium.)
On other items:
Several check-ins wondered about the use and safety of optical aid to view the night sky. At this link one can find a comparison of optics from which the amateur astronomer or casual observer can choose.
Bill KC9MDS asked about kinds of solar activity, namely, solar flares and coronal mass ejections (aka CME) that affect radio propagation. At this link is a comparison of these solar phenomena; at this link are some of the effects of these phenomena, such as auroras (aka Aurora Borealis, or the Northern Lights). A CME is a solar storm that can be especially significant for Earth; it is believed that a particularly strong CME hit Earth in 1859, since then known as the Carrington Event.
Bill KC9MDS also asked about any other solar effects on the Earth, other than auroras and disruptions in radio propagation, and, whether the Sun can influence or cause earthquakes. In response, Roy KD9RSE indicated that here have been studies, both simple and more involved, in an attempt to answer this conclusively.
Brandon K9PZ offered that some recent research has tried to establish a connection between solar flares and earthquakes; that is, though the connection of solar activity and earthquakes is not well established, some electromagnetic anomalies contemporaneous with earthquakes have been observed and recorded along with coincident solar activity, which seems to suggest a connection. Popular outlets for astronomy news have picked up this theme, too, here; though, sources of information for geologic activity on Earth do not agree that there is a connection. No doubt more work is needed in this area.
Of course, when observing the Sun, one should take great care to avoid eye damage (and never look through a scope or binocular at the Sun). Roy KD9RSE asked check-ins to begin to consider plans for the total solar eclipse that will be visible (across the range of the repeater) on April 8, 2024. For example, one can safely use a welder's plate (#14) to glance at the Sun to note the progress of the Moon as it encroaches upon the disk of the Sun, prior to totality.
Don KD9QJG had several parting questions for the Astro Net, such as how the eye works and the origin of an eye floater; at this link, too, is a brief medical description of this condition that can afflict the eye. He also asked check-ins to guess the weight of a rain cloud (the answer to which is found here).
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KC9MDS Bill
KD9VBE Randy
KD9QJG Don
KD9HOK Greg
NI9K Nick
KK9F Al
K9PZ Brandon (check-in via text)
The Astro Net airs every second and fourth full week of each month, on Wednesday of those weeks. Tune in to the next Astro Net on Wednesday, February 22, 2023, at 8:00 p.m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
Astro Net recap, for January 25, 2023
Highlights from on-the-air ham radio transmission on 147.045 MHz
For the 18th installment of the Astro Net on 1/25/2023, here is a summary (not a transcript) of various topics that check-ins had the chance to discuss on-the-air.
On a new time:
Don KA9QJG, Glenn KD9PNY, and Roy KD9RSE briefly talked about the prospect to move the Astro Net to a new, later time, namely, 8:00 p. m. (local time), to accommodate more check-ins. All seemed to be Ok with this move, which will be promoted here and in the future.
On solar activity:
While Roy KD9RSE updated check-ins and listeners on recent solar indices that seem favorable for radio propagation, total solar flux has decreased slightly in recent days, but this still tends to favor propagation on most of the popular ham bands. Glenn KD9PNY alerted listeners that Dr. Tamitha Skov, the Space Weather Woman, has released a recent podcast that describes major sunspots this past week, but with no significant flare activity directed at Earth at this time.
On planet activity:
Glenn KD9PNY and Roy KD9RSE also reported on the position and visibility of various planets this month, similar to the previous Astro Net that described Jupiter (high and bright through midnight), Venus (bright just after sunset), Saturn (low to the west after sunset), Mars (near the reddish star Aldebaran in Taurus, the Bull). Mercury is now visible briefly above the local horizon just before dawn. Glenn KD9RSE reported that the small, hot planet reaches its greatest elongation (or angle) from the Sun, as seen from our location, in the coming days.
On meteor activity:
Roy KD9RSE reported that at least one meteor shower through the latter part of this month may be worth watching, namely, the Quandrantid meteor shower. The Quadrantids get their name from an old designation of a star pattern on early star charts, but represent meteors seen from the direction of the current constellations Draco (the Dragon) and Bootes (the Herdsman). The Lyrid meteor shower was also mentioned, but (more accurately) is one to look at in Spring, as it's noted for occasional fireballs.
On other items:
Bill KC9MDS brought up news about the possible implications of "quantum entanglement", a concept for which the Nobel Prize in Physics was awarded (last Autumn) to three physicists who help to elucidate the conundrum of "spooky action at a distance". (A detailed analysis is found here.)
In a subsequent, somewhat extended discussion, Paul KF9ER offered some insights on the prospects of faith versus religion in our modern interpretation of the cosmos. In response, Roy KD9RSE offered that, for now, we conclude that theories in modern science explain what can be measured accurately, given the limits that modern science may have to observing the natural world.
This view does not preclude the existence or importance of the supernatural; rather, it simply means we may need other ways by which to arrive at explanations that are satisfactory. That is, our comprehension of the supernatural world, which rely on articles of faith, may not be explained adequately by tenets of science, and, that these tenets can change with advances in observation, measurement, and interpretation.
Greg KD9HOK described his experience using mostly vertically polarized antennas with his new Icom 7300 versus the prospect of the addition of a horizontally polarized antenna. Bill KC9MDS described some differences to watch for with both kinds, some theory of which is outlined here and online discussion offered here.
As radio propagation may improve or vary in the coming month, Ron K9JON wondered about what the peak of Cycle 25 may bring and when. In response, Glenn KD9PNY and Roy KD9RSE cited that the projected peak for Cycle 25 may arrive by July 2025.
Roy KD9RSE offered his own view that though Cycle 25 is a boon for hams, as a solar cycle it may not amount to much more than Cycle 24. He bases this on a practice used in weather forecasting (among several), which uses an unskilled and decidedly simple "good guess" of persistence, to explain whether that the likelihood of current conditions can extend to the near future. (Let's see if he's right, come the time of July 2025, and, when Cycle 25 concludes.)
Don KA9QJG wrapped up the Net for the evening with a narration by "Rosie" on 10 amazing facts about the Moon, the summary of which also is posted in the current news group. He also posted information about astronaut Jerry Ross (who also shares a birth date with Buzz Aldrin) and the astronaut's amateur radio connection, already posted to the news group, found here (by Don KA9QJG) and found here (by Ben KC9UNS).
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KA9QJG Don
W9ABN Ed
W9AHI Alex
KA9EFD Allan
AC9KO Tony
KC9MDS Bill
KD9HOK Greg
KC9CHS Mark
KF9ER Paul
KD9JVW Brad
KD9IQU Nick
K9JON Ron
KA9GKT Henry
The Astro Net airs every second and fourth full week of each month, on Wednesday of those weeks. Tune in to the next Astro Net on Wednesday, February 8, 2023, at 8:00 p.m. Note: New time!
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
On a new time:
Don KA9QJG, Glenn KD9PNY, and Roy KD9RSE briefly talked about the prospect to move the Astro Net to a new, later time, namely, 8:00 p. m. (local time), to accommodate more check-ins. All seemed to be Ok with this move, which will be promoted here and in the future.
On solar activity:
While Roy KD9RSE updated check-ins and listeners on recent solar indices that seem favorable for radio propagation, total solar flux has decreased slightly in recent days, but this still tends to favor propagation on most of the popular ham bands. Glenn KD9PNY alerted listeners that Dr. Tamitha Skov, the Space Weather Woman, has released a recent podcast that describes major sunspots this past week, but with no significant flare activity directed at Earth at this time.
On planet activity:
Glenn KD9PNY and Roy KD9RSE also reported on the position and visibility of various planets this month, similar to the previous Astro Net that described Jupiter (high and bright through midnight), Venus (bright just after sunset), Saturn (low to the west after sunset), Mars (near the reddish star Aldebaran in Taurus, the Bull). Mercury is now visible briefly above the local horizon just before dawn. Glenn KD9RSE reported that the small, hot planet reaches its greatest elongation (or angle) from the Sun, as seen from our location, in the coming days.
On meteor activity:
Roy KD9RSE reported that at least one meteor shower through the latter part of this month may be worth watching, namely, the Quandrantid meteor shower. The Quadrantids get their name from an old designation of a star pattern on early star charts, but represent meteors seen from the direction of the current constellations Draco (the Dragon) and Bootes (the Herdsman). The Lyrid meteor shower was also mentioned, but (more accurately) is one to look at in Spring, as it's noted for occasional fireballs.
On other items:
Bill KC9MDS brought up news about the possible implications of "quantum entanglement", a concept for which the Nobel Prize in Physics was awarded (last Autumn) to three physicists who help to elucidate the conundrum of "spooky action at a distance". (A detailed analysis is found here.)
In a subsequent, somewhat extended discussion, Paul KF9ER offered some insights on the prospects of faith versus religion in our modern interpretation of the cosmos. In response, Roy KD9RSE offered that, for now, we conclude that theories in modern science explain what can be measured accurately, given the limits that modern science may have to observing the natural world.
This view does not preclude the existence or importance of the supernatural; rather, it simply means we may need other ways by which to arrive at explanations that are satisfactory. That is, our comprehension of the supernatural world, which rely on articles of faith, may not be explained adequately by tenets of science, and, that these tenets can change with advances in observation, measurement, and interpretation.
Greg KD9HOK described his experience using mostly vertically polarized antennas with his new Icom 7300 versus the prospect of the addition of a horizontally polarized antenna. Bill KC9MDS described some differences to watch for with both kinds, some theory of which is outlined here and online discussion offered here.
As radio propagation may improve or vary in the coming month, Ron K9JON wondered about what the peak of Cycle 25 may bring and when. In response, Glenn KD9PNY and Roy KD9RSE cited that the projected peak for Cycle 25 may arrive by July 2025.
Roy KD9RSE offered his own view that though Cycle 25 is a boon for hams, as a solar cycle it may not amount to much more than Cycle 24. He bases this on a practice used in weather forecasting (among several), which uses an unskilled and decidedly simple "good guess" of persistence, to explain whether that the likelihood of current conditions can extend to the near future. (Let's see if he's right, come the time of July 2025, and, when Cycle 25 concludes.)
Don KA9QJG wrapped up the Net for the evening with a narration by "Rosie" on 10 amazing facts about the Moon, the summary of which also is posted in the current news group. He also posted information about astronaut Jerry Ross (who also shares a birth date with Buzz Aldrin) and the astronaut's amateur radio connection, already posted to the news group, found here (by Don KA9QJG) and found here (by Ben KC9UNS).
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KA9QJG Don
W9ABN Ed
W9AHI Alex
KA9EFD Allan
AC9KO Tony
KC9MDS Bill
KD9HOK Greg
KC9CHS Mark
KF9ER Paul
KD9JVW Brad
KD9IQU Nick
K9JON Ron
KA9GKT Henry
The Astro Net airs every second and fourth full week of each month, on Wednesday of those weeks. Tune in to the next Astro Net on Wednesday, February 8, 2023, at 8:00 p.m. Note: New time!
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
Astro Net recap, for January 11, 2022
Highlights from on-the-air ham radio transmission on 147.045 MHz
For the 17th installment of the Astro Net on 1/11/2023, here is a summary (not a transcript) of various topics that check-ins had the chance to discuss on-the-air.
On solar activity:
While Roy KD9RSE updated check-ins and listeners on recent solar indices that seem favorable for radio propagation, total solar flux has increased recently, which also tends to favor propagation. However, Glenn KD9PNY reported that at least two flares had been spotted this past week (which may have resulted in some brief radio blackout or high static in various places worldwide). He also alerted listeners to his YouTube channel (which features Dr. Tamitha Skov, the Space Weather Woman), and highlighted his favorite solar activity links, such as this one.
On planet activity:
Glenn KD9PNY and Roy KD9RSE also reported on the position and visibility of various planets this month, such as Jupiter (high and bright through midnight), Venus (bright just after sunset), Saturn (low to the west after sunset), Mars (near the reddish star Aldebaran in Taurus, the Bull), and Mercury (not visible this month).
On other items:
That the Sun and weather conditions affect radio propagation is well known among ham radio enthusiasts, but Don KA9QJG asked specifically about the connection of any solar activity with recent weather events (such as flooding in California after months of drought-like conditions there) to Earth weather in general. This can be a detailed topic, but there are some key items to note.
In response, Roy KD9RSE outlined a difference between weather and climate, the terms of which are sometimes (inaccurately) used interchangeably; that is, weather refers to conditions at a specific time at a specific locale, whereas climate refers to conditions over a broad area over a long period of time. That is to say, specific weather events are not indicative of trends in climate change; an isolated weather event, however bad it might be to those it affects, does not necessarily portend a long-term trend in climate. As of now, it's apparent that all the mechanisms of weather and climate are still not well understood.
For example, in past decades, pilots would report red lightning and blue lightning high above clouds, sometimes shooting into outer space; scientists were skeptical of these observations at the time, but they eventually came to understand that there are such phenomena, known as jets and sprites. So, indeed, scientists are still learning the nuances of weather and climate.
As far as weather events that become newsworthy, media companies that feature weather reports (as part of news) obviously are in business to make money from viewers watching their broadcasts and from their sponsors' commercials; so, they broadcast a package of information, however assembled, as "news". That is, a report of extended rainfall or of widespread drought (while devastating to the extreme in either event) might be hyped as unprecedented, many such events are largely governed by a host of factors, which include latitude, altitude, topography, proximity to large bodies of water, and prevailing conditions; these are the same factors that can influence climate. This is not to say that we have no effect on our surroundings; but, it is to say that nature does not discriminate in the severity of the effects of both weather and climate.
More precisely, it is generally recognized that the Sun does indeed have its own set of effects. A past history of the Sun's influence on climate (as a whole, across the globe), particularly regarding the presence (or lack) of sunspots, reveals a distinct pattern. For example, ground-based observations and historical interpretation of the Sun's spot activity (over centuries) have shown these patterns (at this link), which appear to indicate that sunspot numbers (over time) do coincide with changes in climate in various parts of the world (where good data are available). But even the most technical analyses of historical and modern data still do not concede an accurate representation of how the Sun affects climate.
So, the Sun's role in these events (both of weather and climate) still is being studied; though, it is readily apparent (and has been for some time) that the state or condition of the Sun (at any given time, by way of its usual solar indices, its presence or lack of sunspots, and its overall irradiance) does contribute to both weather and climate, though scientists appear to admit this guardedly.
Too, there have been linkages to changes in climate due to the natural variations of impersonal forces that govern our home planet, such as its angle of tilt in space, the direction of its axial tilt, and its distance from the Sun. These natural variations have been confirmed by field data (such as ice cores recovered from Antarctica and Greenland, which capture past climate conditions). One can play with this interactive (at this link), which show how these variations link to some of the field data.
Indeed, scientists are still learning the nuances of weather and climate, and, no doubt the Astro Net can spend more time on this important topic.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
WA9ZPM Mike
K9PZ Brandon
KA9QJG Don
KA9GKT Henry
KD9HOK Greg
KC9MDS Bill
KD9IQU Nick
The Astro Net airs every second and fourth full week of each month, on Wednesday of those weeks. Tune in to the next Astro Net on Wednesday, January 25, 2023, at 7:00 p.m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
On solar activity:
While Roy KD9RSE updated check-ins and listeners on recent solar indices that seem favorable for radio propagation, total solar flux has increased recently, which also tends to favor propagation. However, Glenn KD9PNY reported that at least two flares had been spotted this past week (which may have resulted in some brief radio blackout or high static in various places worldwide). He also alerted listeners to his YouTube channel (which features Dr. Tamitha Skov, the Space Weather Woman), and highlighted his favorite solar activity links, such as this one.
On planet activity:
Glenn KD9PNY and Roy KD9RSE also reported on the position and visibility of various planets this month, such as Jupiter (high and bright through midnight), Venus (bright just after sunset), Saturn (low to the west after sunset), Mars (near the reddish star Aldebaran in Taurus, the Bull), and Mercury (not visible this month).
On other items:
That the Sun and weather conditions affect radio propagation is well known among ham radio enthusiasts, but Don KA9QJG asked specifically about the connection of any solar activity with recent weather events (such as flooding in California after months of drought-like conditions there) to Earth weather in general. This can be a detailed topic, but there are some key items to note.
In response, Roy KD9RSE outlined a difference between weather and climate, the terms of which are sometimes (inaccurately) used interchangeably; that is, weather refers to conditions at a specific time at a specific locale, whereas climate refers to conditions over a broad area over a long period of time. That is to say, specific weather events are not indicative of trends in climate change; an isolated weather event, however bad it might be to those it affects, does not necessarily portend a long-term trend in climate. As of now, it's apparent that all the mechanisms of weather and climate are still not well understood.
For example, in past decades, pilots would report red lightning and blue lightning high above clouds, sometimes shooting into outer space; scientists were skeptical of these observations at the time, but they eventually came to understand that there are such phenomena, known as jets and sprites. So, indeed, scientists are still learning the nuances of weather and climate.
As far as weather events that become newsworthy, media companies that feature weather reports (as part of news) obviously are in business to make money from viewers watching their broadcasts and from their sponsors' commercials; so, they broadcast a package of information, however assembled, as "news". That is, a report of extended rainfall or of widespread drought (while devastating to the extreme in either event) might be hyped as unprecedented, many such events are largely governed by a host of factors, which include latitude, altitude, topography, proximity to large bodies of water, and prevailing conditions; these are the same factors that can influence climate. This is not to say that we have no effect on our surroundings; but, it is to say that nature does not discriminate in the severity of the effects of both weather and climate.
More precisely, it is generally recognized that the Sun does indeed have its own set of effects. A past history of the Sun's influence on climate (as a whole, across the globe), particularly regarding the presence (or lack) of sunspots, reveals a distinct pattern. For example, ground-based observations and historical interpretation of the Sun's spot activity (over centuries) have shown these patterns (at this link), which appear to indicate that sunspot numbers (over time) do coincide with changes in climate in various parts of the world (where good data are available). But even the most technical analyses of historical and modern data still do not concede an accurate representation of how the Sun affects climate.
So, the Sun's role in these events (both of weather and climate) still is being studied; though, it is readily apparent (and has been for some time) that the state or condition of the Sun (at any given time, by way of its usual solar indices, its presence or lack of sunspots, and its overall irradiance) does contribute to both weather and climate, though scientists appear to admit this guardedly.
Too, there have been linkages to changes in climate due to the natural variations of impersonal forces that govern our home planet, such as its angle of tilt in space, the direction of its axial tilt, and its distance from the Sun. These natural variations have been confirmed by field data (such as ice cores recovered from Antarctica and Greenland, which capture past climate conditions). One can play with this interactive (at this link), which show how these variations link to some of the field data.
Indeed, scientists are still learning the nuances of weather and climate, and, no doubt the Astro Net can spend more time on this important topic.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
WA9ZPM Mike
K9PZ Brandon
KA9QJG Don
KA9GKT Henry
KD9HOK Greg
KC9MDS Bill
KD9IQU Nick
The Astro Net airs every second and fourth full week of each month, on Wednesday of those weeks. Tune in to the next Astro Net on Wednesday, January 25, 2023, at 7:00 p.m.
In the meantime, to all ham radio operators and to everybody everywhere: Keep watching the skies!
Astro Net recap, for December 21, 2022
Highlights from on-the-air ham radio transmission on 147.045 MHz
For the 16th installment of the Astro Net on 12/21/2022, here is a summary (not a transcript) of various topics that check-ins had the chance to discuss on-the-air. This installment also serves as the "holiday edition", since it's appropriate during this season of the year to present the astronomical possibilities for the identity of the Star of Bethlehem.
On solar activity:
Glenn KD9PNY reported that solar activity has been relatively stable this past week, though some activity picked up recently. That is, as key indices seem favorable for radio propagation, total solar flux has increased slightly, which tends to favor propagation.
Once again, as noted in previous recaps by Roy KD9RSE, in recent weeks predictions still insist that Cycle 25 will continue to be good for amateur radio operators, as shown at this link (posted in a previous recap). News for hams may be better in the coming years as Cycle 25 reaches its midpoint by 2025 (in terms of the length of time of a typical 11-year sunspot cycle), which suggests a peak of solar activity. (Note that this is a projection of possible solar activity; your actual propagation may vary.)
On lunar activity:
As the Moon appears this week just past its Last Quarter (or sometimes called its Third Quarter) phase, a clear night with essentially "no Moon" in the sky can favor the seeing of faint object, such as meteors.
On meteor showers:
As the previous recap showed, the Geminid meteor shower may be viewed this month, perhaps at least up until Christmas Eve, for which the circumstances and viewing prospects appear at this link. Note that the Ursid meteor shower may also be visible, weather permitting.
As noted in a previous Net recap, too, just about every month (at this link) has a meteor shower that may be worth seeing. When viewing meteor showers, it is often best to venture out after midnight (if not cloudy outside), when the Earth, turned away from the Sun to give us nighttime, is plowing through debris in its orbit. That debris, mainly the leftovers from past comets, makes up the bulk of meteors often seen.
On the Star of Bethlehem:
Roy KD9RSE launched into a presentation of the astronomical possibilities for the Star of Bethlehem, which, though seasonal and significant at this time of year, has often attracted speculation from astronomers and other scientists about its possible identity, as seen in the sky. Not to detract from its seasonal significance or its religious import, the Star of Bethlehem has garnered attention among scientists from the perspective that the Star may be identified as a natural phenomenon that has historical corroboration.
Over the centuries, various interpretations have been advanced. That is, the celestial objects seen in the night sky have had mythological significance to past peoples; for this reason, it's been worthwhile to explore how they might have interpreted a natural, celestial wonder. Of the more plausible explanations of this natural wonder, at least according to a former astronomer at The Adler Planetarium, was that Star was both a memorable and significant conjunction of planets Jupiter and Venus and the bright star Regulus (in the constellation of Leo, the Lion). From an astronomical viewpoint, that actual conjunction is known to have occurred, and, its interpretation in the ancient world evidently had sufficient astrological significance to prompt a caravan to travel from the Persian empire to the land of Judea.
That and other astronomical interpretations for the Star were aired every Christmas season during The Adler Planetarium's annual sky show. But that sky show, a staple of seasonal entertainment for decades, was discontinued by The Adler Planetarium a dozen years ago. (The original newspaper link is unavailable.) However, an original text, produced by The Adler Planetarium as the basis for its annual Christmas sky show, can still be purchased online.
As an aside, in December 2021 there appeared in the sky a fairly rare conjunction of Jupiter and Saturn that coincidentally occurred during the holiday season, and was dubbed the "Christmas Star" by the press. By that time, though, The Adler Planetarium had long ceased its annual sky show about the original Christmas Star, and instead offered sky watchers the chance for a "a virtual 'hangout'" for viewing.
Paul KF9ER cited that possible dates for the actual appearance of the Star may be problematic, perhaps due to the construction of the modern Gregorian calendar. Indeed, the history of our modern calendar dates back centuries, but one historical context here indicates the an error was introduced a long time ago into calendrical calculations (that was never resolved), and, here, that, subsequently, various past reasons for the date of Christmas have been numerous.
On other items:
That the Winter Solstice starts on this date of this particular Astro Net, Don KA9QJG offered a perspective that occurred in 1968. In that year, Apollo 8 lifted off for the Moon, the first time that humans had ventured off the Earth to visit our nearest celestial neighbor.
During that historic flight to the Moon, on Christmas Eve, with tens of millions on Earth watching Apollo's view of the Moon from lunar orbit, the three astronauts on board read passages from the Book of Genesis. (While there was a secular objection to this, a lawsuit about it was later dismissed.) It was thought that this reading of Scripture was unplanned and spontaneous; but, evidently NASA had included time for this reading in the official flight plan. The Apollo 8 mission was an upbeat note to an otherwise turbulent year in this nation's history.
In keeping with the spirit of the season, Don KA9QJG informed listeners that he had confirmed that Santa Claus would be in the vicinity of the KA9QJG repeater by 7:00 p. m. this Christmas Eve, December 24, for boys and girls to tune in and talk to Santa. Details for the pending visit may be found amid the news group postings.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KF9ER Paul
KA9QJG Don
KD9HOK Greg
KA9EFD Allan
The Astro Net airs every second and fourth full week of each month, on Wednesday of those weeks. Tune in to the next Astro Net on Wednesday, January 11, 2023, at 7:00 p.m.
In the meantime, to all ham radio operators and to everyone everywhere: Keep watching the skies!
On solar activity:
Glenn KD9PNY reported that solar activity has been relatively stable this past week, though some activity picked up recently. That is, as key indices seem favorable for radio propagation, total solar flux has increased slightly, which tends to favor propagation.
Once again, as noted in previous recaps by Roy KD9RSE, in recent weeks predictions still insist that Cycle 25 will continue to be good for amateur radio operators, as shown at this link (posted in a previous recap). News for hams may be better in the coming years as Cycle 25 reaches its midpoint by 2025 (in terms of the length of time of a typical 11-year sunspot cycle), which suggests a peak of solar activity. (Note that this is a projection of possible solar activity; your actual propagation may vary.)
On lunar activity:
As the Moon appears this week just past its Last Quarter (or sometimes called its Third Quarter) phase, a clear night with essentially "no Moon" in the sky can favor the seeing of faint object, such as meteors.
On meteor showers:
As the previous recap showed, the Geminid meteor shower may be viewed this month, perhaps at least up until Christmas Eve, for which the circumstances and viewing prospects appear at this link. Note that the Ursid meteor shower may also be visible, weather permitting.
As noted in a previous Net recap, too, just about every month (at this link) has a meteor shower that may be worth seeing. When viewing meteor showers, it is often best to venture out after midnight (if not cloudy outside), when the Earth, turned away from the Sun to give us nighttime, is plowing through debris in its orbit. That debris, mainly the leftovers from past comets, makes up the bulk of meteors often seen.
On the Star of Bethlehem:
Roy KD9RSE launched into a presentation of the astronomical possibilities for the Star of Bethlehem, which, though seasonal and significant at this time of year, has often attracted speculation from astronomers and other scientists about its possible identity, as seen in the sky. Not to detract from its seasonal significance or its religious import, the Star of Bethlehem has garnered attention among scientists from the perspective that the Star may be identified as a natural phenomenon that has historical corroboration.
Over the centuries, various interpretations have been advanced. That is, the celestial objects seen in the night sky have had mythological significance to past peoples; for this reason, it's been worthwhile to explore how they might have interpreted a natural, celestial wonder. Of the more plausible explanations of this natural wonder, at least according to a former astronomer at The Adler Planetarium, was that Star was both a memorable and significant conjunction of planets Jupiter and Venus and the bright star Regulus (in the constellation of Leo, the Lion). From an astronomical viewpoint, that actual conjunction is known to have occurred, and, its interpretation in the ancient world evidently had sufficient astrological significance to prompt a caravan to travel from the Persian empire to the land of Judea.
That and other astronomical interpretations for the Star were aired every Christmas season during The Adler Planetarium's annual sky show. But that sky show, a staple of seasonal entertainment for decades, was discontinued by The Adler Planetarium a dozen years ago. (The original newspaper link is unavailable.) However, an original text, produced by The Adler Planetarium as the basis for its annual Christmas sky show, can still be purchased online.
As an aside, in December 2021 there appeared in the sky a fairly rare conjunction of Jupiter and Saturn that coincidentally occurred during the holiday season, and was dubbed the "Christmas Star" by the press. By that time, though, The Adler Planetarium had long ceased its annual sky show about the original Christmas Star, and instead offered sky watchers the chance for a "a virtual 'hangout'" for viewing.
Paul KF9ER cited that possible dates for the actual appearance of the Star may be problematic, perhaps due to the construction of the modern Gregorian calendar. Indeed, the history of our modern calendar dates back centuries, but one historical context here indicates the an error was introduced a long time ago into calendrical calculations (that was never resolved), and, here, that, subsequently, various past reasons for the date of Christmas have been numerous.
On other items:
That the Winter Solstice starts on this date of this particular Astro Net, Don KA9QJG offered a perspective that occurred in 1968. In that year, Apollo 8 lifted off for the Moon, the first time that humans had ventured off the Earth to visit our nearest celestial neighbor.
During that historic flight to the Moon, on Christmas Eve, with tens of millions on Earth watching Apollo's view of the Moon from lunar orbit, the three astronauts on board read passages from the Book of Genesis. (While there was a secular objection to this, a lawsuit about it was later dismissed.) It was thought that this reading of Scripture was unplanned and spontaneous; but, evidently NASA had included time for this reading in the official flight plan. The Apollo 8 mission was an upbeat note to an otherwise turbulent year in this nation's history.
In keeping with the spirit of the season, Don KA9QJG informed listeners that he had confirmed that Santa Claus would be in the vicinity of the KA9QJG repeater by 7:00 p. m. this Christmas Eve, December 24, for boys and girls to tune in and talk to Santa. Details for the pending visit may be found amid the news group postings.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KF9ER Paul
KA9QJG Don
KD9HOK Greg
KA9EFD Allan
The Astro Net airs every second and fourth full week of each month, on Wednesday of those weeks. Tune in to the next Astro Net on Wednesday, January 11, 2023, at 7:00 p.m.
In the meantime, to all ham radio operators and to everyone everywhere: Keep watching the skies!
Astro Net recap, for December 7, 2022
Highlights from on-the-air ham radio transmission on 147.045 MHz
For the 15th installment of the Astro Net on 12/7/2022, here is a summary (not a transcript) of various topics that check-ins had the chance to discuss on-the-air.
On solar activity:
Solar activity has been relatively stable and mostly quiet this past week, though a predicted, minor geomagnetic storm did arrive at Earth and offered some good auroral displays at high latitudes, with details at this link.
As noted in previous recaps in recent weeks, predictions still insist that Cycle 25 will continue to be good for amateur radio operators, as shown at this link (posted in a previous recap). News for hams may be better in the coming years as Cycle 25 reaches its midpoint by 2025 (in terms of the length of time of a typical 11-year sunspot cycle), which suggests a peak of solar activity. (Note that this is a projection of possible solar activity; your actual propagation may vary.)
On lunar activity:
The main topic was the Mars occultation, on tap for this very evening, after the conclusion of the Astro Net. An occultation is when the Moon passes between us and a distant celestial object, like a star or planet, which, in effect, occults (or, “hides”) the object; in this instance, the planet Mars will be hidden by the Moon from our viewing vantage here on Earth, hence the name of this phenomenon.
Roy KD9RSE encouraged listeners to this Net to check the weather by the end of this Net tonight and look for a opportunity to view this unusual sight. Weather permitting, this occultation of Mars would be a good challenge with optical aid (like a steady binocular or good telescope) in combo with a camera. (Local times for the occultation appear here, but only if clear skies persist.)
Addendum: Though the KA9QJG repeater area was beset by clouds, Roy KD9RSE captured an image of Mars (through a fortuitous hole in those clouds) after the planet emerged from behind the Moon. In the image (below), the tiny dot on the right side of the Moon is Mars, one minute after it emerged from behind the Moon. Image taken on 12/7/2022 at 10:06 p. m. CST, by hand-held cell phone and a reflecting telescope of 6-inch aperture (f /5.6) at 43x magnification.
On solar activity:
Solar activity has been relatively stable and mostly quiet this past week, though a predicted, minor geomagnetic storm did arrive at Earth and offered some good auroral displays at high latitudes, with details at this link.
As noted in previous recaps in recent weeks, predictions still insist that Cycle 25 will continue to be good for amateur radio operators, as shown at this link (posted in a previous recap). News for hams may be better in the coming years as Cycle 25 reaches its midpoint by 2025 (in terms of the length of time of a typical 11-year sunspot cycle), which suggests a peak of solar activity. (Note that this is a projection of possible solar activity; your actual propagation may vary.)
On lunar activity:
The main topic was the Mars occultation, on tap for this very evening, after the conclusion of the Astro Net. An occultation is when the Moon passes between us and a distant celestial object, like a star or planet, which, in effect, occults (or, “hides”) the object; in this instance, the planet Mars will be hidden by the Moon from our viewing vantage here on Earth, hence the name of this phenomenon.
Roy KD9RSE encouraged listeners to this Net to check the weather by the end of this Net tonight and look for a opportunity to view this unusual sight. Weather permitting, this occultation of Mars would be a good challenge with optical aid (like a steady binocular or good telescope) in combo with a camera. (Local times for the occultation appear here, but only if clear skies persist.)
Addendum: Though the KA9QJG repeater area was beset by clouds, Roy KD9RSE captured an image of Mars (through a fortuitous hole in those clouds) after the planet emerged from behind the Moon. In the image (below), the tiny dot on the right side of the Moon is Mars, one minute after it emerged from behind the Moon. Image taken on 12/7/2022 at 10:06 p. m. CST, by hand-held cell phone and a reflecting telescope of 6-inch aperture (f /5.6) at 43x magnification.
On meteor showers:
Glenn KD9PNY alerted listeners to this Net about the prospect for viewing the Geminid meteor shower this month, for which the circumstances and viewing prospects appear at this link. As noted in a previous Net recap, just about every month (at this link) has a meteor shower that may be worth seeing.
On other items:
Don KA9QJG presented some news about radio interferometry, which, for astronomical use, makes use of linked radio dish antennas or large-scale arrays, to take radio images of distant, deep-space objects. (A technical overview is at this link.) From the amateur radio perspective, though, evidently there are hams exploring the use of ham radio for use in interferometry; a recent discussion group is found here, which might be useful to explore in a future Tech Net.
Don KA9QJG also wanted to know about the likely fate of an astronaut, if doing a tethered EVA (extra-vehicular activity) outside the International Space Station, were to become untethered. In response, several things might happen: the astronaut might continue to move with the ISS in the same orbit; but, if the astronaut were to experience any slight atmospheric drag over time, then the astronaut would drift away from the ISS. Moreover, if a considerable force had broken the tether, then the astronaut might be flailing away, unable to stabilize the induced spin from the force that broke the tether. And, more to the point, if the astronaut were relying on oxygen or electrical support through that tether, then there may be only mere moments of survival after that tether has broken. But, apparently, NASA does train astronauts with emergency procedures in the event of an accident that sends them floating free. (Here's also a NASA listing of various EVAs, at this link.)
Don KA9QJG also inquired of the hazards of space travel. In response, once astronauts and equipment are beyond the Earth's atmosphere, the relentless radiation from the Sun bombards the travelers in the craft. An example of the long-term hazards was brought home by astronauts from Apollo 12.
One part of this Moon mission, after it landed, was to collect pieces from the Surveyor 3 landing craft, that had preceded Apollo 12 to the Moon by nearly three years. The collected pieces of the spacecraft showed discoloration from a combination of Sun exposure and fine lunar dust. At one point, on its examination back on Earth, a piece of Surveyor 3 produced a microbe (a staph germ), which scientists had first thought may have survived the harsh conditions on the Moon, but that was not the case; the microbe was the result of lax hygiene in the analysis lab while the Surveyor pieces were being examined.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
W9JOM Jim
KC9CHS Mark
KA9GKT Henry
KA9QJG Don
W9ABN Ed
KD9HOK Greg
The Astro Net airs every second and fourth full week of each month, on Wednesday of those weeks. Tune in to the next Astro Net on Wednesday, December 21, 2022, at 7:00 p.m.
In the meantime, to all ham radio operators and to everyone everywhere: Keep watching the skies!
Glenn KD9PNY alerted listeners to this Net about the prospect for viewing the Geminid meteor shower this month, for which the circumstances and viewing prospects appear at this link. As noted in a previous Net recap, just about every month (at this link) has a meteor shower that may be worth seeing.
On other items:
Don KA9QJG presented some news about radio interferometry, which, for astronomical use, makes use of linked radio dish antennas or large-scale arrays, to take radio images of distant, deep-space objects. (A technical overview is at this link.) From the amateur radio perspective, though, evidently there are hams exploring the use of ham radio for use in interferometry; a recent discussion group is found here, which might be useful to explore in a future Tech Net.
Don KA9QJG also wanted to know about the likely fate of an astronaut, if doing a tethered EVA (extra-vehicular activity) outside the International Space Station, were to become untethered. In response, several things might happen: the astronaut might continue to move with the ISS in the same orbit; but, if the astronaut were to experience any slight atmospheric drag over time, then the astronaut would drift away from the ISS. Moreover, if a considerable force had broken the tether, then the astronaut might be flailing away, unable to stabilize the induced spin from the force that broke the tether. And, more to the point, if the astronaut were relying on oxygen or electrical support through that tether, then there may be only mere moments of survival after that tether has broken. But, apparently, NASA does train astronauts with emergency procedures in the event of an accident that sends them floating free. (Here's also a NASA listing of various EVAs, at this link.)
Don KA9QJG also inquired of the hazards of space travel. In response, once astronauts and equipment are beyond the Earth's atmosphere, the relentless radiation from the Sun bombards the travelers in the craft. An example of the long-term hazards was brought home by astronauts from Apollo 12.
One part of this Moon mission, after it landed, was to collect pieces from the Surveyor 3 landing craft, that had preceded Apollo 12 to the Moon by nearly three years. The collected pieces of the spacecraft showed discoloration from a combination of Sun exposure and fine lunar dust. At one point, on its examination back on Earth, a piece of Surveyor 3 produced a microbe (a staph germ), which scientists had first thought may have survived the harsh conditions on the Moon, but that was not the case; the microbe was the result of lax hygiene in the analysis lab while the Surveyor pieces were being examined.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
W9JOM Jim
KC9CHS Mark
KA9GKT Henry
KA9QJG Don
W9ABN Ed
KD9HOK Greg
The Astro Net airs every second and fourth full week of each month, on Wednesday of those weeks. Tune in to the next Astro Net on Wednesday, December 21, 2022, at 7:00 p.m.
In the meantime, to all ham radio operators and to everyone everywhere: Keep watching the skies!
Astro Net recap, for November 23, 2022
Highlights from on-the-air ham radio transmission on 147.045 MHz
For the 14th installment of the Astro Net on 11/23/2022, here is a summary (not a transcript) of various topics that check-ins had the chance to discuss on-the-air.
On solar activity:
In the recent week before this Net last month, solar activity has been relatively flat and mostly quiet. The popular ham bands have shifted readily, but propagation appears to have been fairly steady (though not on all bands).
Nevertheless, predictions still insist that Cycle 25 will continue to be good for amateur radio operators. At this link (posted in a previous recap), the news may be better in the coming years as Cycle 25 reaches its midpoint by 2025 (in terms of the length of time of a typical 11-year sunspot cycle), which suggests a peak of solar activity. (Note that this is a projection of possible solar activity; your actual propagation may vary.)
On lunar activity:
On the night of this Net is this month's New Moon, which is not usually visible to us on Earth (except during a solar eclipse).
But what will be visible (weather permitting) on the night of the next Astro Net will be an occultation of Mars. An occultation is when the Moon passes between us and a distant celestial object, like a star or planet. Glenn KD9PNY detailed that, in this instance, on December 7 the Moon will pass in front of, or occult (that is, “hide”) the planet Mars from our view here on Earth.
At this link, note the time and circumstances of this occultation, as it will commence at about the time the Astro Net would likely conclude; that is, shortly after 9 p. m. local time. If clear skies persist that evening, a good binocular on a steady mount will be just right for viewing the start of the occultation, when Mars winks out of view as the Moon passes in front of it.
On seeing planets:
Glenn KD9PNY and Roy KD9RSE commented on the visibility of various planets through the night. After sunset all this month, Jupiter continues to dominate the sky, appearing as a very bright star high in the sky. Of course, Mars (mentioned just above) still appears distinctly reddish orange, and, will make a neat contrast when seen next to the Moon at the start of its December occultation.
On meteor showers:
The Leonid meteor shower this month did not appear to produce many visible meteors from its radiant, the vanishing point out of which meteors appear to stream. But, like the Leonids (in mid-November) which appear to emanate from the constellation Leo (the Lion) and the Perseids (in mid-August), which appear to emanate from the constellation Perseus (the Hero), just about every month (at this link) has a meteor shower that may be worth seeing.
Tony KC8LGE detailed a memorable experience he had in viewing the Perseids one year. On that night, fog quickly socked in his viewing site, but building a bonfire warmed away the fog, so he and others were treated to the fine spectacle of that annual meteor shower.
There are also opportunities for public viewing of meteors and other celestial events at various venues around the Midwest. For example, Roy KD9RSE viewed the Perseids one year from Newbury State Park (in Door County, WI), which has hosted a nighttime viewing program for many years. Tony KC8LGE also reports that a local astronomy club (out of Grand Rapids, MI) operates the Veen Observatory (in Lowell, MI), which hosts nights of public viewing.
On other items:
Henry KA9GKT recalled the fun he had with a telescope owned by his father and noting the Sun's seasonal shift across the sky for sunrises and sunsets.
Don KA9QJG asked about the inclination of various satellites in Earth orbit. In response, communication satellites often are maintained in geosynchronous orbits, which can have an inclination, or tilt, with respect to the plane of the Earth's equator. So, a satellite with an inclination of 43º would be tilted at that angle to the plane of the equator, and, would likely appear to be motionless in the sky at the latitude of that same angle.
For comparison, the geostationary orbit is the most straightforward kind of geosynchronous orbit, as a satellite in that orbit would appear “parked” above a point along the equator; that is, as the satellite kept apace with Earth's rotation it would have an inclination of zero to the plane of Earth's equator. (The nuances between these two kinds of orbits are described at this link.)
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KD9VBE Randy
K9PZ Brandon
KA9GKT Henry
KD9UOW David
KC9ER Ricky (Enrique)
KA9QJG Don
K9SGA Dan
KC8LGE Tony
KD9GHO Stewart
KD9IQU Nick
K9JON Ron
The Astro Net airs every second and fourth full week of each month, on Wednesday of those weeks. Tune in to the next Astro Net on Wednesday, December 7, 2022, at 7:00 p.m.
In the meantime, to all ham radio operators and to everyone everywhere: Keep watching the skies!
On solar activity:
In the recent week before this Net last month, solar activity has been relatively flat and mostly quiet. The popular ham bands have shifted readily, but propagation appears to have been fairly steady (though not on all bands).
Nevertheless, predictions still insist that Cycle 25 will continue to be good for amateur radio operators. At this link (posted in a previous recap), the news may be better in the coming years as Cycle 25 reaches its midpoint by 2025 (in terms of the length of time of a typical 11-year sunspot cycle), which suggests a peak of solar activity. (Note that this is a projection of possible solar activity; your actual propagation may vary.)
On lunar activity:
On the night of this Net is this month's New Moon, which is not usually visible to us on Earth (except during a solar eclipse).
But what will be visible (weather permitting) on the night of the next Astro Net will be an occultation of Mars. An occultation is when the Moon passes between us and a distant celestial object, like a star or planet. Glenn KD9PNY detailed that, in this instance, on December 7 the Moon will pass in front of, or occult (that is, “hide”) the planet Mars from our view here on Earth.
At this link, note the time and circumstances of this occultation, as it will commence at about the time the Astro Net would likely conclude; that is, shortly after 9 p. m. local time. If clear skies persist that evening, a good binocular on a steady mount will be just right for viewing the start of the occultation, when Mars winks out of view as the Moon passes in front of it.
On seeing planets:
Glenn KD9PNY and Roy KD9RSE commented on the visibility of various planets through the night. After sunset all this month, Jupiter continues to dominate the sky, appearing as a very bright star high in the sky. Of course, Mars (mentioned just above) still appears distinctly reddish orange, and, will make a neat contrast when seen next to the Moon at the start of its December occultation.
On meteor showers:
The Leonid meteor shower this month did not appear to produce many visible meteors from its radiant, the vanishing point out of which meteors appear to stream. But, like the Leonids (in mid-November) which appear to emanate from the constellation Leo (the Lion) and the Perseids (in mid-August), which appear to emanate from the constellation Perseus (the Hero), just about every month (at this link) has a meteor shower that may be worth seeing.
Tony KC8LGE detailed a memorable experience he had in viewing the Perseids one year. On that night, fog quickly socked in his viewing site, but building a bonfire warmed away the fog, so he and others were treated to the fine spectacle of that annual meteor shower.
There are also opportunities for public viewing of meteors and other celestial events at various venues around the Midwest. For example, Roy KD9RSE viewed the Perseids one year from Newbury State Park (in Door County, WI), which has hosted a nighttime viewing program for many years. Tony KC8LGE also reports that a local astronomy club (out of Grand Rapids, MI) operates the Veen Observatory (in Lowell, MI), which hosts nights of public viewing.
On other items:
Henry KA9GKT recalled the fun he had with a telescope owned by his father and noting the Sun's seasonal shift across the sky for sunrises and sunsets.
Don KA9QJG asked about the inclination of various satellites in Earth orbit. In response, communication satellites often are maintained in geosynchronous orbits, which can have an inclination, or tilt, with respect to the plane of the Earth's equator. So, a satellite with an inclination of 43º would be tilted at that angle to the plane of the equator, and, would likely appear to be motionless in the sky at the latitude of that same angle.
For comparison, the geostationary orbit is the most straightforward kind of geosynchronous orbit, as a satellite in that orbit would appear “parked” above a point along the equator; that is, as the satellite kept apace with Earth's rotation it would have an inclination of zero to the plane of Earth's equator. (The nuances between these two kinds of orbits are described at this link.)
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KD9VBE Randy
K9PZ Brandon
KA9GKT Henry
KD9UOW David
KC9ER Ricky (Enrique)
KA9QJG Don
K9SGA Dan
KC8LGE Tony
KD9GHO Stewart
KD9IQU Nick
K9JON Ron
The Astro Net airs every second and fourth full week of each month, on Wednesday of those weeks. Tune in to the next Astro Net on Wednesday, December 7, 2022, at 7:00 p.m.
In the meantime, to all ham radio operators and to everyone everywhere: Keep watching the skies!
Astro Net recap, for November 9, 2022
Highlights from on-the-air ham radio transmission on 147.045 MHz
For the 13th installment of the Astro Net on 11/9/2022, here is a summary (not a transcript) of various topics that check-ins wanted to discuss. (Note that there was no recap for 10/19/2022, while the KA9QJG repeater was offline for refurbishment.)
On solar activity:
Like last month, solar activity in November is relatively high, which is indicated by high solar flux (SFI > 130) and low K-index (at or near zero), both of which appear to show that radio propagation is very good overall for ham radio. Reports from hams are that the bands are booming. That indeed appears to be the case (as of this post); that is, the ham bands (like 10-meter to 40-meter) are recently quite active. Conditions can and do change, but even the A-index (at this point) indicates a fairly quiet, settled condition. While there was a recent solar flare, little affect on radio propagation is indicated.
Predictions do indicate that Cycle 25 continues to be good for amateur radio operators. By this link, the news may be better in the coming years as Cycle 25 reaches its midpoint by 2025 (in terms of the length of time of a typical 11-year sunspot cycle), which suggests a peak of solar activity. (Note that this is a projection of possible solar activity; your actual propagation may vary.)
On lunar activity:
On his pass through the repeater's coverage area, Chris N6CTA wanted to know about the recent lunar eclipse. That recent eclipse, nicknamed the Beaver Blood Moon, which shone in our sky in the wee hours of November 8, is the last full lunar eclipse to appear until 2025.
Since eclipses seen from Earth always involve the Moon, a reminder to all check-ins and listeners, there will be two solar eclipses in 2023. The first will be a total solar eclipse on April 8, 2023, to be seen across the KA9QJG repeater's coverage area. Be prepared for the last great eclipse seen from the continental USA for quite some time. Also, there will an annular solar eclipse on October 14, 2023 (which is not exactly a total one, and, only visible elsewhere in the USA).
Since the Moon is so prominent in the sky, it's obviously a recurring theme across many cultures. One popular item is the Blue Moon, which is most often described as the second Full Moon in a month (since each calendar month usually only has a single Full Moon). This link details how the term originated; the next Blue Moon occurs on August 31, 2023.
On seeing planets:
Glenn KD9PNY and Roy KD9RSE commented on the visibility of various planets through the night. After sunset all this month, Jupiter dominates the sky, appearing as a very bright star, Saturn, half as bright, rises ahead of Jupiter and appears in the southwest sky after sunset.
Mars appears distinctly orange-red, and appears above the prominent constellation Orion, which heralds the approach of Winter across the Northern Hemisphere. (See the sample sky chart, below, that shows both Orion and Mars, due south by mid-month, after midnight.)
On solar activity:
Like last month, solar activity in November is relatively high, which is indicated by high solar flux (SFI > 130) and low K-index (at or near zero), both of which appear to show that radio propagation is very good overall for ham radio. Reports from hams are that the bands are booming. That indeed appears to be the case (as of this post); that is, the ham bands (like 10-meter to 40-meter) are recently quite active. Conditions can and do change, but even the A-index (at this point) indicates a fairly quiet, settled condition. While there was a recent solar flare, little affect on radio propagation is indicated.
Predictions do indicate that Cycle 25 continues to be good for amateur radio operators. By this link, the news may be better in the coming years as Cycle 25 reaches its midpoint by 2025 (in terms of the length of time of a typical 11-year sunspot cycle), which suggests a peak of solar activity. (Note that this is a projection of possible solar activity; your actual propagation may vary.)
On lunar activity:
On his pass through the repeater's coverage area, Chris N6CTA wanted to know about the recent lunar eclipse. That recent eclipse, nicknamed the Beaver Blood Moon, which shone in our sky in the wee hours of November 8, is the last full lunar eclipse to appear until 2025.
Since eclipses seen from Earth always involve the Moon, a reminder to all check-ins and listeners, there will be two solar eclipses in 2023. The first will be a total solar eclipse on April 8, 2023, to be seen across the KA9QJG repeater's coverage area. Be prepared for the last great eclipse seen from the continental USA for quite some time. Also, there will an annular solar eclipse on October 14, 2023 (which is not exactly a total one, and, only visible elsewhere in the USA).
Since the Moon is so prominent in the sky, it's obviously a recurring theme across many cultures. One popular item is the Blue Moon, which is most often described as the second Full Moon in a month (since each calendar month usually only has a single Full Moon). This link details how the term originated; the next Blue Moon occurs on August 31, 2023.
On seeing planets:
Glenn KD9PNY and Roy KD9RSE commented on the visibility of various planets through the night. After sunset all this month, Jupiter dominates the sky, appearing as a very bright star, Saturn, half as bright, rises ahead of Jupiter and appears in the southwest sky after sunset.
Mars appears distinctly orange-red, and appears above the prominent constellation Orion, which heralds the approach of Winter across the Northern Hemisphere. (See the sample sky chart, below, that shows both Orion and Mars, due south by mid-month, after midnight.)
On constellations:
That we see shapes among the stars is not unusual. Every culture and civilization across history has had its own view of the night sky. To some civilizations Orion was seen as a giant, a hero, or a shepherd. More familiar patterns, like the Big Dipper (which is an asterism, not a constellation, there's a difference), was seen variously as a ladle, a cleaver, a wagon, or the rear end of a large bear. Nowadays, naming of celestial objects falls to the International Astronomical Union, an outfit which has positioned itself to be the arbiter of organizing and codifying sky objects seen in the night sky.
On meteor showers:
By November 18, the Leonid meteor shower reaches its peak, which means sky observers may spot meteors across the sky, and, more likely after midnight. Meteors are the remnants of passing comets, which leave in their wake millions of tiny flecks of dusty debris.
Don KA9QJG asked about how meteors form and how they might good for radio propagation.
That comet debris collides at high speed with Earth's upper atmosphere. The tiny flecks burn up, but the high speed of those flecks ionizes the atmosphere, leaving bright streaks, which are the meteors we see from the ground. Those brief streaks of ionization can act as a temporary reflector for radio waves, which can allow for ham-radio tests with meteor scatter (and which likely takes planning, skill, and expense to carry out successfully).
Meteors showers are named for the constellations out of which they appear to stream, as Earth in its orbit plows through that dust and debris. So the Leonids (in mid-November) appear to emanate from the constellation Leo (the Lion), while the Perseids (in mid-August) appear to emanate from the constellation Perseus (the Hero). In the sample sky chart, above, note, too, the Orionids, out of Orion, and the Taurids, out of Taurus (the Bull).
On other items:
Ricky KC9ER asked about the red sunset sky he'd seen earlier in the evening. An old saying (“Red sky morning, sailor's warning; red sky night, sailor's delight”) may be ancient folklore but it does have a good deal of truth to it. Dust and aerosols in the air help to form clouds, which could bring rain; the aerosols can dim the Sun's light, too, to allow just the reddish light to be seen through the dust at sunset or sunrise.
High air pressure (which generally brings good weather) keeps aerosols low in the air. If the sky (as Enrique KC9ER observed) glows red at sunset, presumably that dust will be kept low in the air, due to incoming high air pressure, and eventually settle out overnight. This can mean fewer aerosols the next day and few clouds to form, that might bring rain.
By contrast, low air pressure (which often brings stormy weather) allows aerosols to rise in the atmosphere to form clouds; so, a red sky in the morning suggests high pressure has moved on and stormy low pressure is coming in; so, clouds could form and rain might fall.
To sum up the evening's Net, Don KA9QJG and Henry KA9GKT recalled night-sky memories from their younger days: Don, while on a trip to the north woods in Canada, to see a truly dark sky; Henry, remembering the fun he had with a telescope owned by his father and noting the Sun's seasonal shift.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
N6CTA Chris (mobile, enroute eastward on I-90)
KC9ER Ricky (Enrique)
KA9QJG Don
AK9RT Kurt
KA9GKT Henry
KD9HOK Greg
W9ABN Ed
KD9UOW David
KA9EFD Allan
The Astro Net airs every second and fourth full week of each month, on Wednesday of those weeks. Tune in to the next Astro Net on Wednesday, November 23, 2022, at 7:00 p.m.
In the meantime, to all ham radio operators and to everyone everywhere: Keep watching the skies!
That we see shapes among the stars is not unusual. Every culture and civilization across history has had its own view of the night sky. To some civilizations Orion was seen as a giant, a hero, or a shepherd. More familiar patterns, like the Big Dipper (which is an asterism, not a constellation, there's a difference), was seen variously as a ladle, a cleaver, a wagon, or the rear end of a large bear. Nowadays, naming of celestial objects falls to the International Astronomical Union, an outfit which has positioned itself to be the arbiter of organizing and codifying sky objects seen in the night sky.
On meteor showers:
By November 18, the Leonid meteor shower reaches its peak, which means sky observers may spot meteors across the sky, and, more likely after midnight. Meteors are the remnants of passing comets, which leave in their wake millions of tiny flecks of dusty debris.
Don KA9QJG asked about how meteors form and how they might good for radio propagation.
That comet debris collides at high speed with Earth's upper atmosphere. The tiny flecks burn up, but the high speed of those flecks ionizes the atmosphere, leaving bright streaks, which are the meteors we see from the ground. Those brief streaks of ionization can act as a temporary reflector for radio waves, which can allow for ham-radio tests with meteor scatter (and which likely takes planning, skill, and expense to carry out successfully).
Meteors showers are named for the constellations out of which they appear to stream, as Earth in its orbit plows through that dust and debris. So the Leonids (in mid-November) appear to emanate from the constellation Leo (the Lion), while the Perseids (in mid-August) appear to emanate from the constellation Perseus (the Hero). In the sample sky chart, above, note, too, the Orionids, out of Orion, and the Taurids, out of Taurus (the Bull).
On other items:
Ricky KC9ER asked about the red sunset sky he'd seen earlier in the evening. An old saying (“Red sky morning, sailor's warning; red sky night, sailor's delight”) may be ancient folklore but it does have a good deal of truth to it. Dust and aerosols in the air help to form clouds, which could bring rain; the aerosols can dim the Sun's light, too, to allow just the reddish light to be seen through the dust at sunset or sunrise.
High air pressure (which generally brings good weather) keeps aerosols low in the air. If the sky (as Enrique KC9ER observed) glows red at sunset, presumably that dust will be kept low in the air, due to incoming high air pressure, and eventually settle out overnight. This can mean fewer aerosols the next day and few clouds to form, that might bring rain.
By contrast, low air pressure (which often brings stormy weather) allows aerosols to rise in the atmosphere to form clouds; so, a red sky in the morning suggests high pressure has moved on and stormy low pressure is coming in; so, clouds could form and rain might fall.
To sum up the evening's Net, Don KA9QJG and Henry KA9GKT recalled night-sky memories from their younger days: Don, while on a trip to the north woods in Canada, to see a truly dark sky; Henry, remembering the fun he had with a telescope owned by his father and noting the Sun's seasonal shift.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
N6CTA Chris (mobile, enroute eastward on I-90)
KC9ER Ricky (Enrique)
KA9QJG Don
AK9RT Kurt
KA9GKT Henry
KD9HOK Greg
W9ABN Ed
KD9UOW David
KA9EFD Allan
The Astro Net airs every second and fourth full week of each month, on Wednesday of those weeks. Tune in to the next Astro Net on Wednesday, November 23, 2022, at 7:00 p.m.
In the meantime, to all ham radio operators and to everyone everywhere: Keep watching the skies!
Note: No Astro Net recap for October 19, 2022
Highlights from on-the-air ham radio transmission on 147.045 MHz
No installment of the Astro Net on 10/19/2022. The KA9QJG repeater has been offline recently for needed upgrade. Due to that upgrade (still in progress as of this date), the Astro Net is anticipated to resume in two weeks; that is, during the second full week of next month, on November 9.
Update: As of 10/21/2022, the KA9QJG repeater appears to be back online.
Update: As of 10/21/2022, the KA9QJG repeater appears to be back online.
Astro Net recap, for October 5, 2022
Highlights from on-the-air ham radio transmission on 147.045 MHz
For the 12th installment of the Astro Net on 10/5/2022, here is a summary (not a transcript) of various topics.
On the launch of Crew-5:
Glenn KD9PNY and Roy KD9RSE reported on the successful launch of the latest astronauts, known as Crew-5, to the International Space Station, which includes a Russian cosmonaut, Japanese astronaut, and a Native American astronaut commanding the mission.
On solar activity:
Solar activity is relatively high, which is indicated by high solar flux (> 150) and low K-index (of about 2), both of which appear to show that radio propagation is very good overall for ham radio. That indeed appears to be the case (as of this post); that is, the ham bands (like 10-meter to 40-meter) are recently relatively active. Conditions can and do change, as the A-index indicates an unsettled overall condition. Also, according the Space Weather Woman, Tamitha Skov, while there have been recent solar flares, most have been glancing blows toward Earth, though the probability of a blast from an Earth-facing solar flare is fairly high. Fluctuation among solar indices is not unusual (as hams know well), and, propagation can hold some surprises with sudden band openings.
On seeing planets:
Glenn KD9PNY and Roy KD9RSE commented on the visibility of various planets through the night. After sunset all this month, Jupiter shines brightly in the eastern sky, and dominates the night sky till dawn. Saturn, half as bright, rises ahead of Jupiter. Both are visible all night long; by sunup, both are seen in the western sky due to Earth's rotation.
Mars appears distinctly orange-red. Glenn KD9PNY compared its color to reddish Aldebaran (that appears nearby to Mars), the brightest star in the Zodiac constellation of Taurus (the Bull), and represents the angry red eye of the Bull.
On satellites:
Hams talk by radio, and satellites enliven the hobby. Getting the chance to talk to astronauts on board the International Space Station can be worthwhile, with the right timing and set-up. The location of the ISS can be found at this link. (At that link, one can type in your location without a login or subscription.) Other possibilities for ham-radio communication include the AMSAT collection of satellites.
Don KA9QJG asked about the rash of recent Starlink satellites launched to assist communications in areas ravaged by Hurricane Ian, and, how they are deployed in orbit. Roy KD9RSE responded that recent Starlink satellites (launched by SpaceX) are arrays of small satellites in low-Earth orbit, which provide multiple chances to communicate over broad geographic areas worldwide. These satellites are typically launched in bunches, then adjusted in orbital attitude with on-board thrusters. As a follow-up to that response, at this link is a live, rotatable, global map of Starlink positions; also, at this link is an article that describes how Starlink satellites work, once in orbit.
While conventional communications satellites are often placed in geosynchronous orbits, Starlink satellites appear not to be so, to make it straightforward to de-orbit them when they're no longer useful. Note that when discussing kinds of orbits for conventional communications satellites, there is a subtle difference between satellites in geostationary orbit versus those in geosynchronous orbit.
On other items:
Glenn KD9PNY likes to use his fists to observe. The human fist held at arm's length, aloft and against the backdrop of the sky, can be used to measure an angle across the sky. That is, the width of the human fist is about 10 degrees of angular measure; so, it can be used to measure the angular distance between bright objects in the sky. It also can be use to measure one's latitude in the Northern Hemisphere, by sighting how high Polaris (i.e., the North Star) is above your local, north horizon. So, by sighting Polaris above the horizon, one can determine one's angular distance north of the equator, or, one's latitude.
Tim KD9QKE shared his own observation, noting the height of Polaris above the north horizon and the changing position of the Big Dipper during the night. This is a good, fairly effective method, too, for telling time, when using the sky position of the Big Dipper as a 24-hour clock face. It can seem a little involved to try; but, to use the Big Dipper as a nighttime clock, step-by-step instructions are here at this link.
Perhaps not only radio propagation has been relatively good, but so has the local potato crop, as reported by Greg KD9HOK from his garden. Though radios and potatoes may have little in common, potatoes can be a crude conductor of electricity. (And boiled potatoes appear to improve conductivity. To prove that point, making a potato battery might be a fun activity for children.) As an aside, though the voltage (per tater) is low, it'd take lots of potatoes to run a radio rig.
On the subject of low power, Brandon K9PZ does a fair amount of QRP activity. For this Net, he checked in at 8 watts with a hand-held transceiver and homemade antenna (based on a design found among the selections at this source).
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KA9EFD Allan
K9JON Ron
K9QKE Tim
K9PZ Brandon
KA9QJG Don
KD9HOK Greg
KD9UOW David
KD9PNS Karl
KK9F Al (post-Net check-in)
The Astro Net airs every second and fourth full week of each month, on Wednesday of those weeks. Tune in to the next Astro Net on Wednesday, October 19, 2022, at 7:00 p.m.
In the meantime, keep watching the skies.
On the launch of Crew-5:
Glenn KD9PNY and Roy KD9RSE reported on the successful launch of the latest astronauts, known as Crew-5, to the International Space Station, which includes a Russian cosmonaut, Japanese astronaut, and a Native American astronaut commanding the mission.
On solar activity:
Solar activity is relatively high, which is indicated by high solar flux (> 150) and low K-index (of about 2), both of which appear to show that radio propagation is very good overall for ham radio. That indeed appears to be the case (as of this post); that is, the ham bands (like 10-meter to 40-meter) are recently relatively active. Conditions can and do change, as the A-index indicates an unsettled overall condition. Also, according the Space Weather Woman, Tamitha Skov, while there have been recent solar flares, most have been glancing blows toward Earth, though the probability of a blast from an Earth-facing solar flare is fairly high. Fluctuation among solar indices is not unusual (as hams know well), and, propagation can hold some surprises with sudden band openings.
On seeing planets:
Glenn KD9PNY and Roy KD9RSE commented on the visibility of various planets through the night. After sunset all this month, Jupiter shines brightly in the eastern sky, and dominates the night sky till dawn. Saturn, half as bright, rises ahead of Jupiter. Both are visible all night long; by sunup, both are seen in the western sky due to Earth's rotation.
Mars appears distinctly orange-red. Glenn KD9PNY compared its color to reddish Aldebaran (that appears nearby to Mars), the brightest star in the Zodiac constellation of Taurus (the Bull), and represents the angry red eye of the Bull.
On satellites:
Hams talk by radio, and satellites enliven the hobby. Getting the chance to talk to astronauts on board the International Space Station can be worthwhile, with the right timing and set-up. The location of the ISS can be found at this link. (At that link, one can type in your location without a login or subscription.) Other possibilities for ham-radio communication include the AMSAT collection of satellites.
Don KA9QJG asked about the rash of recent Starlink satellites launched to assist communications in areas ravaged by Hurricane Ian, and, how they are deployed in orbit. Roy KD9RSE responded that recent Starlink satellites (launched by SpaceX) are arrays of small satellites in low-Earth orbit, which provide multiple chances to communicate over broad geographic areas worldwide. These satellites are typically launched in bunches, then adjusted in orbital attitude with on-board thrusters. As a follow-up to that response, at this link is a live, rotatable, global map of Starlink positions; also, at this link is an article that describes how Starlink satellites work, once in orbit.
While conventional communications satellites are often placed in geosynchronous orbits, Starlink satellites appear not to be so, to make it straightforward to de-orbit them when they're no longer useful. Note that when discussing kinds of orbits for conventional communications satellites, there is a subtle difference between satellites in geostationary orbit versus those in geosynchronous orbit.
On other items:
Glenn KD9PNY likes to use his fists to observe. The human fist held at arm's length, aloft and against the backdrop of the sky, can be used to measure an angle across the sky. That is, the width of the human fist is about 10 degrees of angular measure; so, it can be used to measure the angular distance between bright objects in the sky. It also can be use to measure one's latitude in the Northern Hemisphere, by sighting how high Polaris (i.e., the North Star) is above your local, north horizon. So, by sighting Polaris above the horizon, one can determine one's angular distance north of the equator, or, one's latitude.
Tim KD9QKE shared his own observation, noting the height of Polaris above the north horizon and the changing position of the Big Dipper during the night. This is a good, fairly effective method, too, for telling time, when using the sky position of the Big Dipper as a 24-hour clock face. It can seem a little involved to try; but, to use the Big Dipper as a nighttime clock, step-by-step instructions are here at this link.
Perhaps not only radio propagation has been relatively good, but so has the local potato crop, as reported by Greg KD9HOK from his garden. Though radios and potatoes may have little in common, potatoes can be a crude conductor of electricity. (And boiled potatoes appear to improve conductivity. To prove that point, making a potato battery might be a fun activity for children.) As an aside, though the voltage (per tater) is low, it'd take lots of potatoes to run a radio rig.
On the subject of low power, Brandon K9PZ does a fair amount of QRP activity. For this Net, he checked in at 8 watts with a hand-held transceiver and homemade antenna (based on a design found among the selections at this source).
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KA9EFD Allan
K9JON Ron
K9QKE Tim
K9PZ Brandon
KA9QJG Don
KD9HOK Greg
KD9UOW David
KD9PNS Karl
KK9F Al (post-Net check-in)
The Astro Net airs every second and fourth full week of each month, on Wednesday of those weeks. Tune in to the next Astro Net on Wednesday, October 19, 2022, at 7:00 p.m.
In the meantime, keep watching the skies.
Astro Net recap, for September 21, 2022
Highlights from on-the-air ham radio transmission on 147.045 MHz
For the 11th installment of the Astro Net on 9/21/2022, here is a summary (not a transcript) of various topics.
On solar activity:
Though solar activity has fluctuated (as this is not unusual in any solar cycle) with relatively high total flux but low-to-midrange indices, propagation can hold some surprises, with sudden band openings. Hams can also stay tuned to possible greyline propagation, which hams know can improve Tx and Rx on lower bands, especially at the time around an equinox (like the Autumnal Equinox that just passed).
On seeing planets:
Glenn KD9PNY and Roy KD9RSE commented on the visibility of various planets through the night. By 9 p. m. all this month, Jupiter shines brightly in the eastern sky, and dominates the night sky till dawn. Saturn, half as bright, rises ahead of Jupiter. Both are visible all night long; by sunup, both are seen in the western sky due to Earth's rotation.
Mars gets brighter and appears distinctly orange-red. Glenn KD9PNY compared its color to reddish Aldebaran (that appears nearby to Mars), the brightest star in the Zodiac constellation of Taurus (the Bull), and represents the angry red eye of the Bull.
Says Roy KD9RSE, by December the planet Mars will appear its brightest, which occurs at its opposition, when Mars (or any planet) rises opposite the Sun, as seen in our sky. This is normal for Mars and happens about every two years, as Earth passes Mars in its orbit around the Sun.
On night-sky terms:
Like other sciences, astronomy has its own lingo. Two terms often used are conjunction and magnitude.
Conjunction refers to the location of at least two objects in the sky that appear close together, as seen from Earth (though they're very far apart in outer space).
Magnitude refers to the apparent brightness of a planet or star in the sky, as seen from Earth. Magnitude is a logarithmic scale of numbers, based on our perception of an object's brightness, not its actual brightness in outer space.
The basic magnitude scale runs from zero to six, with zero as a bright object (like Jupiter) and six as as an object just barely visible by the unclothed eye. That is, the lower the number, the brighter the object appears. Each move from one number to the next represents a change of about 2.5 times in brightness; for example, a zero magnitude star is about 2.5 times brighter than a 1st-magnitude star. For the brightest objects (like Venus, the Moon, and the Sun), there are negative values of magnitude.
Again, this a relative scale as used on star charts. In a clear and dark sky, one should be able to see down to 6th magnitude. As a rough guide, if you can see all the stars in the “bowl” of the Little Dipper, then it's a clear and dark sky.
On other objects seen in the sky:
Meteors can blaze across the sky at very bright (or low) magnitudes, sometimes outshining the Moon for a brief moment. For example, a bright fireball was seen across Japan in 2020, over New Zealand last month, and many other places around the world.
Several hams recalled seeing or hearing about such occurrences, such as in 1992. In that same year, too, a car was struck by a meteorite, which is a space rock that hits the ground (or a car). (And auto insurance might cover that, depending on the options in one's policy.)
Over time, satellites can fall from the sky, if their orbit is low and the satellite experiences upper-atmosphere drag. (Of course, there are various kinds of orbits to keep satellites from falling.) Falling satellites and tumbling rocket bodies are potential hazards. One of the more famous falls was Skylab's return to Earth. Even the International Space Station needs to be boosted daily, to keep its orbit stable; at some point, when its mission ends, the ISS, too, may one day become one huge tumbling mass of space junk hurtling Earthward.
On sky phenomena:
Don KA9QJG asked about the cause of red sunrises and red sunsets, as the Astro Net is introduced on the repeater with the well-known expression: "Red sky morning, sailor's warning; red sky night, sailor's delight." The saying is an old one (---even Jesus uttered it---) and has its root in weather science. Red sunrises and sunsets are due to dust (or aerosols) in the air.
Dust that still needs to settle out of the air gives a red sunset, as that dust filters out other wavelengths of the Sun's light, leaving the reddish glow to see; by morning, presumably that dust has settled, leaving few aerosols around which potential storm clouds might form, so the sailor's delight for clear sailing. By contrast, many aerosols still in the air by dawn could lead to the formation of clouds, to bring storms and rain later in the day; so, the sailors' warning in the morning.
On other items:
Don KA9QJG asked about other nautical topics, such as "international waters", a term not well defined legally and likely can be pretty much what a maritime nation wants it water boundaries to be when it comes to claiming conduct and jurisdiction on the high seas. For nations that border the seas, there was once a three-mile limit (a term which appears to be obsolete), and, there has been established (by treaty) a 12-mile limit. (See this link.)
Navigation techniques on the high seas date back centuries. Latitude was reckoned straightforwardly (in the Northern Hemisphere) by sighting Polaris above the horizon to find one's angular distance north of the equator, or, one's latitude. In the Southern Hemisphere, one used the Southern Cross constellation to locate due south, as a means to determine angular distance south of the equator; again, one's latitude.
Prior to a suitable determination of longitude at sea, dead reckoning was used. Once a suitable timepiece was invented (by John Harrison) to keep track of time at sea, sailors could then determine a reliable measure of longitude, to know how far from port one might be. (A good, readable history about the invention of the nautical chronometer you can find at this link.)
Bill KC9MDS offered several prospects for what the Webb Space Telescope might see, given the size of its giant mirror. That is, should distant galaxies be observed that are farther than is presently predicted by the Big Bang theory, then such a theory (and all that it implies, such as expansion, dark matter, dark energy, etc.) might need revision. This and similar topics can be discussed in future installments of the Astro Net.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KA9GKT Henry
K9QKE Tim
KA9QJG Don
KA9EFD Allan
W9ABN Ed
KC9MDS Bill
K9SGA Dan
KK9F Al
KD9UOW David
KD9HOK Greg
KD9VBE Randy
N9QLS Bill
The Astro Net airs every second and fourth full week of each month, on Wednesday of those weeks. Tune in to the next Astro Net on Wednesday, October 5, 2022, at 7:00 p.m.
In the meantime, keep watching the skies.
On solar activity:
Though solar activity has fluctuated (as this is not unusual in any solar cycle) with relatively high total flux but low-to-midrange indices, propagation can hold some surprises, with sudden band openings. Hams can also stay tuned to possible greyline propagation, which hams know can improve Tx and Rx on lower bands, especially at the time around an equinox (like the Autumnal Equinox that just passed).
On seeing planets:
Glenn KD9PNY and Roy KD9RSE commented on the visibility of various planets through the night. By 9 p. m. all this month, Jupiter shines brightly in the eastern sky, and dominates the night sky till dawn. Saturn, half as bright, rises ahead of Jupiter. Both are visible all night long; by sunup, both are seen in the western sky due to Earth's rotation.
Mars gets brighter and appears distinctly orange-red. Glenn KD9PNY compared its color to reddish Aldebaran (that appears nearby to Mars), the brightest star in the Zodiac constellation of Taurus (the Bull), and represents the angry red eye of the Bull.
Says Roy KD9RSE, by December the planet Mars will appear its brightest, which occurs at its opposition, when Mars (or any planet) rises opposite the Sun, as seen in our sky. This is normal for Mars and happens about every two years, as Earth passes Mars in its orbit around the Sun.
On night-sky terms:
Like other sciences, astronomy has its own lingo. Two terms often used are conjunction and magnitude.
Conjunction refers to the location of at least two objects in the sky that appear close together, as seen from Earth (though they're very far apart in outer space).
Magnitude refers to the apparent brightness of a planet or star in the sky, as seen from Earth. Magnitude is a logarithmic scale of numbers, based on our perception of an object's brightness, not its actual brightness in outer space.
The basic magnitude scale runs from zero to six, with zero as a bright object (like Jupiter) and six as as an object just barely visible by the unclothed eye. That is, the lower the number, the brighter the object appears. Each move from one number to the next represents a change of about 2.5 times in brightness; for example, a zero magnitude star is about 2.5 times brighter than a 1st-magnitude star. For the brightest objects (like Venus, the Moon, and the Sun), there are negative values of magnitude.
Again, this a relative scale as used on star charts. In a clear and dark sky, one should be able to see down to 6th magnitude. As a rough guide, if you can see all the stars in the “bowl” of the Little Dipper, then it's a clear and dark sky.
On other objects seen in the sky:
Meteors can blaze across the sky at very bright (or low) magnitudes, sometimes outshining the Moon for a brief moment. For example, a bright fireball was seen across Japan in 2020, over New Zealand last month, and many other places around the world.
Several hams recalled seeing or hearing about such occurrences, such as in 1992. In that same year, too, a car was struck by a meteorite, which is a space rock that hits the ground (or a car). (And auto insurance might cover that, depending on the options in one's policy.)
Over time, satellites can fall from the sky, if their orbit is low and the satellite experiences upper-atmosphere drag. (Of course, there are various kinds of orbits to keep satellites from falling.) Falling satellites and tumbling rocket bodies are potential hazards. One of the more famous falls was Skylab's return to Earth. Even the International Space Station needs to be boosted daily, to keep its orbit stable; at some point, when its mission ends, the ISS, too, may one day become one huge tumbling mass of space junk hurtling Earthward.
On sky phenomena:
Don KA9QJG asked about the cause of red sunrises and red sunsets, as the Astro Net is introduced on the repeater with the well-known expression: "Red sky morning, sailor's warning; red sky night, sailor's delight." The saying is an old one (---even Jesus uttered it---) and has its root in weather science. Red sunrises and sunsets are due to dust (or aerosols) in the air.
Dust that still needs to settle out of the air gives a red sunset, as that dust filters out other wavelengths of the Sun's light, leaving the reddish glow to see; by morning, presumably that dust has settled, leaving few aerosols around which potential storm clouds might form, so the sailor's delight for clear sailing. By contrast, many aerosols still in the air by dawn could lead to the formation of clouds, to bring storms and rain later in the day; so, the sailors' warning in the morning.
On other items:
Don KA9QJG asked about other nautical topics, such as "international waters", a term not well defined legally and likely can be pretty much what a maritime nation wants it water boundaries to be when it comes to claiming conduct and jurisdiction on the high seas. For nations that border the seas, there was once a three-mile limit (a term which appears to be obsolete), and, there has been established (by treaty) a 12-mile limit. (See this link.)
Navigation techniques on the high seas date back centuries. Latitude was reckoned straightforwardly (in the Northern Hemisphere) by sighting Polaris above the horizon to find one's angular distance north of the equator, or, one's latitude. In the Southern Hemisphere, one used the Southern Cross constellation to locate due south, as a means to determine angular distance south of the equator; again, one's latitude.
Prior to a suitable determination of longitude at sea, dead reckoning was used. Once a suitable timepiece was invented (by John Harrison) to keep track of time at sea, sailors could then determine a reliable measure of longitude, to know how far from port one might be. (A good, readable history about the invention of the nautical chronometer you can find at this link.)
Bill KC9MDS offered several prospects for what the Webb Space Telescope might see, given the size of its giant mirror. That is, should distant galaxies be observed that are farther than is presently predicted by the Big Bang theory, then such a theory (and all that it implies, such as expansion, dark matter, dark energy, etc.) might need revision. This and similar topics can be discussed in future installments of the Astro Net.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KA9GKT Henry
K9QKE Tim
KA9QJG Don
KA9EFD Allan
W9ABN Ed
KC9MDS Bill
K9SGA Dan
KK9F Al
KD9UOW David
KD9HOK Greg
KD9VBE Randy
N9QLS Bill
The Astro Net airs every second and fourth full week of each month, on Wednesday of those weeks. Tune in to the next Astro Net on Wednesday, October 5, 2022, at 7:00 p.m.
In the meantime, keep watching the skies.
Astro Net recap, for September 7, 2022
Highlights from on-the-air ham radio transmission on 147.045 MHz
For the 10th installment of the Astro Net on 9/7/2022, here is a summary (not a transcript) of various topics.
On solar activity:
This is another installment that starts with little active solar information; that is, while the solar indices have been intermittently elevated, there are no major storms to report that might adversely affect radio propagation, at least as of this writing.
On the natural world:
Glenn KD9PNY commented on mass migration of Monarch butterflies, currently underway across this part of the Midwest that lies within their migration corridor. Roy KD9RSE pointed out that mimicry in the natural world allows species, such as Monarch and Viceroy butterflies, to survive predation. Here are of some differences between Monarch butterflies and Viceroy butterflies.
On lunar activity:
Named to mark the extra welcome light for harvesting crops after sundown, this month's full phase of the Moon in folklore is known as the Harvest Moon. That is, the Full Moon closest to the date of the Autumnal Equinox (i.e., first day of Fall) is called the Harvest Moon. It appears bright for several evenings in a row, due to the angle to the local horizon at which the Moon is seen to rise. That is, the Moon's orbit, tilted as it is to the ecliptic, makes the Moon rise sooner than it might otherwise be seen to do at other times of the year.
On why and where we see the Sun, planets, and eclipses:
The ecliptic is that path, as seen from Earth, which represents the plane of our Solar System. The Sun appears to move along the ecliptic (due to Earth's revolution around the Sun). Most planets (with the exception of Pluto, which is indeed a planet) revolve around the Sun pretty much within the plane of the Solar System; so, most planets are seen along this swath of sky through which the ecliptic passes. Also, eclipses (both solar and lunar) can only happen at the ecliptic and only where it crosses the orbit of the Moon.
Another reason the ecliptic gains some importance is because it passes through at least 12 constellations (though there could be a 13th), which comprise the Zodiac. So, as the Sun and planets change position, day-to-day or month-to-month through various Zodiac constellations throughout the year, those positions may hold some meaning to those who choose to follow astrology.
On the zodiacal light:
One other reason the Zodiac can be important for observational astronomy is the appearance of the zodiacal light, which is not an atmospheric phenomenon; rather, it is the illumination of dust (by the Sun) in the plane of the Solar System. From a flat and clear horizon, the zodiacal light can best be seen along the ecliptic before sunup around the Autumnal Equinox (that starts the season of Fall) or after sundown around the Vernal Equinox (that starts the season of Spring).
On new and used equipment:
A couple hams on the Net expressed interest in buying or (like Ed W9ABN) have bought optical aid for the night sky. Taking a cue from other nets, Roy KD9RSE conducted a brief Swap-and-Shop, asking those on the net that if one is considering the purchase of a monocular or a binocular or a telescope, then be sure to review the available range of goods, to know what buy and how to buy.
On places to observe:
If you're still interested in looking through telescopes to get an idea what you might like, then try before buy. And a good place to do that is to attend a star party. Whether for an evening or a weekend, it can be rewarding to look through others' telescopes, to know what appeals. Within driving range of the KA9QJG repeater's coverage area, hams may be able to visit a nearby star party, namely, the Illinois Dark Skies Star Party, which meets every year in late Summer or early Autumn at the Panther Creek State Fish & Wildlife Area, northwest of Springfield, Illinois; this year it meets Sept. 22-25.
On other things:
As the Astro Net wrapped up, Don KA9QJG sought answers to several good questions on the origin of lightning and thunder, which is important to hams for the proper grounding of radio equipment and the ham shack. Here's a link on grounding, though there appears to be some variations here and here. (When it comes to potential damage from lightning, one may also be interested in ham-shack insurance.)
And, finally, this particular Astro Net did not have a specific presentation from the Space Weather Woman; but, one can listen to one of her more recent presentations at this link.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KA9QJG Don
KC9ER Enrique
K9PZ Brandon
W9ABN Ed
K9SGA Dan
KD9EJE Shad
KK9F Al (post-Net check-in)
KD9UOW David (post-Net check-in)
The Astro Net airs every second and fourth full week of each month, on Wednesday of those weeks. Tune in to the next Astro Net on Wednesday, September 21, 2022, at 7:00 p.m.
In the meantime, keep watching the skies.
On solar activity:
This is another installment that starts with little active solar information; that is, while the solar indices have been intermittently elevated, there are no major storms to report that might adversely affect radio propagation, at least as of this writing.
On the natural world:
Glenn KD9PNY commented on mass migration of Monarch butterflies, currently underway across this part of the Midwest that lies within their migration corridor. Roy KD9RSE pointed out that mimicry in the natural world allows species, such as Monarch and Viceroy butterflies, to survive predation. Here are of some differences between Monarch butterflies and Viceroy butterflies.
On lunar activity:
Named to mark the extra welcome light for harvesting crops after sundown, this month's full phase of the Moon in folklore is known as the Harvest Moon. That is, the Full Moon closest to the date of the Autumnal Equinox (i.e., first day of Fall) is called the Harvest Moon. It appears bright for several evenings in a row, due to the angle to the local horizon at which the Moon is seen to rise. That is, the Moon's orbit, tilted as it is to the ecliptic, makes the Moon rise sooner than it might otherwise be seen to do at other times of the year.
On why and where we see the Sun, planets, and eclipses:
The ecliptic is that path, as seen from Earth, which represents the plane of our Solar System. The Sun appears to move along the ecliptic (due to Earth's revolution around the Sun). Most planets (with the exception of Pluto, which is indeed a planet) revolve around the Sun pretty much within the plane of the Solar System; so, most planets are seen along this swath of sky through which the ecliptic passes. Also, eclipses (both solar and lunar) can only happen at the ecliptic and only where it crosses the orbit of the Moon.
Another reason the ecliptic gains some importance is because it passes through at least 12 constellations (though there could be a 13th), which comprise the Zodiac. So, as the Sun and planets change position, day-to-day or month-to-month through various Zodiac constellations throughout the year, those positions may hold some meaning to those who choose to follow astrology.
On the zodiacal light:
One other reason the Zodiac can be important for observational astronomy is the appearance of the zodiacal light, which is not an atmospheric phenomenon; rather, it is the illumination of dust (by the Sun) in the plane of the Solar System. From a flat and clear horizon, the zodiacal light can best be seen along the ecliptic before sunup around the Autumnal Equinox (that starts the season of Fall) or after sundown around the Vernal Equinox (that starts the season of Spring).
On new and used equipment:
A couple hams on the Net expressed interest in buying or (like Ed W9ABN) have bought optical aid for the night sky. Taking a cue from other nets, Roy KD9RSE conducted a brief Swap-and-Shop, asking those on the net that if one is considering the purchase of a monocular or a binocular or a telescope, then be sure to review the available range of goods, to know what buy and how to buy.
On places to observe:
If you're still interested in looking through telescopes to get an idea what you might like, then try before buy. And a good place to do that is to attend a star party. Whether for an evening or a weekend, it can be rewarding to look through others' telescopes, to know what appeals. Within driving range of the KA9QJG repeater's coverage area, hams may be able to visit a nearby star party, namely, the Illinois Dark Skies Star Party, which meets every year in late Summer or early Autumn at the Panther Creek State Fish & Wildlife Area, northwest of Springfield, Illinois; this year it meets Sept. 22-25.
On other things:
As the Astro Net wrapped up, Don KA9QJG sought answers to several good questions on the origin of lightning and thunder, which is important to hams for the proper grounding of radio equipment and the ham shack. Here's a link on grounding, though there appears to be some variations here and here. (When it comes to potential damage from lightning, one may also be interested in ham-shack insurance.)
And, finally, this particular Astro Net did not have a specific presentation from the Space Weather Woman; but, one can listen to one of her more recent presentations at this link.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KA9QJG Don
KC9ER Enrique
K9PZ Brandon
W9ABN Ed
K9SGA Dan
KD9EJE Shad
KK9F Al (post-Net check-in)
KD9UOW David (post-Net check-in)
The Astro Net airs every second and fourth full week of each month, on Wednesday of those weeks. Tune in to the next Astro Net on Wednesday, September 21, 2022, at 7:00 p.m.
In the meantime, keep watching the skies.
Astro Net recap, for August 24, 2022
Highlights from on-the-air ham radio transmission on 147.045 MHz
For the 9th installment of the Astro Net on 8/24/2022, here is a summary (not a transcript) of various topics.
On solar activity:
This installment kicks off with little active solar information; that is, though there was earlier speculation about the prospect for auroral activity due to recent unsettled solar indices, that activity did not materialize this past week.
On another star's activity:
Besides our own Sun (the nearest star to Earth), Betelgeuse, much farther away, has intrigued astronomers recently with its own curious activity (and a revision of its relative size and proximity), as explored at this link. Part of this intrigue, though, as voiced by Glenn KD9PNY, is that there are some indications that Betelguese may explode some day.
On general sky observing:
On clear nights, a telescope makes a fine addition to one's observing. But a telescope, perhaps like a vintage ham radio, needs time to adjust before actual use. That is, just as an old vacuum-tube radio requires some time to warm up (as discussed in an online forum here) so that radio signals are not distorted, a telescope needs to equilibrate to the condition of the air around it, so that sky images are not distorted.
On the Webb Space Telescope's observing:
While the Webb scope is already equilibrated to its harsh environment in outer space, its recent imagery of Jupiter (see here) is stunning to astronomers, showing detail of clouds and auroral activity. That the Webb Telescope takes pictures in the infrared, its images must be made visible as shades of gray and then colorized in the visual spectrum for us to be able to view them.
On ways to observe:
Whether with telescope or binocular, any optical aid to view the night sky should be steady. A good mount for a scope or for a binocular is essential, such as a monopod, or, even a homemade walking stick that can double as a mount.
On places to observe:
During the warm months of the year, it's good to get out under the stars at a star party. Even if you don't own a telescope, star parties are also good places to look through others' scopes, or, to take your portable rig for some remote QRP. (Here's an example where the star party meets ham radio.)
If you really want to take up serious stargazing under dark skies, Glenn KD9PNY suggests taking in some of the dark-sky sites across the USA. On a more formal basis, there are even premier dark-sky sites set up by, or affiliated with, the International Dark Sky Association. (Here's an example of one such set up in Ohio; at the time, Roy KD9RSE had some small involvement with its set-up.)
Getting out under the stars can be exhilarating, if you've not had the chance to see truly dark skies. Greg KD9HOK related just such an account from his family's trips to the vicinity of Rhinelander, WI.
Closer to home and within the range of the KA9QJG repeater's coverage area, hams may be able to visit a nearby star party, and, in the Midwest. The Illinois Dark Skies Star Party meets every year in late Summer or early Autumn at the Panther Creek nature preserve; its next star party is next month.
While observing no matter where you go, too, be alert for curious wildlife that may want to inspect you and your observing site.
On other sky activity:
Dan K9SGA wondered about recent reports of satellite or space station debris, and, its potential to fall back to Earth. A recent post by Randy KD9WBE to the news group linked to video about this. Don KA9QJG wondered about the influence of celestial line-ups on earthly events. For example, when planets line up, is there a potential effect on Earth?
Planetary line-ups appear to be of two kinds; that is, planets appear in the night sky all the time, and, on occasion, also appear to line up across the sky as seen from our vantage on Earth; this is not unusual. But as part of modern superstition or as seen in apocalyptic movies, another kind of planetary line-up occurs to wreak havoc on Earth; in actuality, this is unlikely. An explanation at this link indicates the unlikelihood of any disastrous effect from these latter line-ups.
As far as lunar “line-ups”, that is, whether there is a connection between the appearance of a Full Moon and a rise in childbirth or crime, there is little evidence to suggest that connection, at least as described here and here, though there is still some skepticism. One's own experience often reinforces the perception of night-sky events and their tie to daily happenings.
As far as an actual connection to earthly happenings, the Moon does not only influence the patterns of shoreline tides, but the phase of the Full Moon also appears to coincide with volcanic eruptions, at least there is some speculation in this instance.
And, finally, this particular Astro Net did not have a specific mention of the Space Weather Woman; but, one can listen to one of her more recent presentations at this link.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KC9ER Ricky
KC9CHS Mark
K9PZ Brandon
KA9QJG Don
W9ABN Ed
K9SGA Dan
KD9HOK Greg
The Astro Net airs every second and fourth week of the month, on Wednesday of those weeks. Tune in to the next Astro Net on Wednesday, September 7, 2022, at 7:00 p.m.
In the meantime, keep watching the skies.
On solar activity:
This installment kicks off with little active solar information; that is, though there was earlier speculation about the prospect for auroral activity due to recent unsettled solar indices, that activity did not materialize this past week.
On another star's activity:
Besides our own Sun (the nearest star to Earth), Betelgeuse, much farther away, has intrigued astronomers recently with its own curious activity (and a revision of its relative size and proximity), as explored at this link. Part of this intrigue, though, as voiced by Glenn KD9PNY, is that there are some indications that Betelguese may explode some day.
On general sky observing:
On clear nights, a telescope makes a fine addition to one's observing. But a telescope, perhaps like a vintage ham radio, needs time to adjust before actual use. That is, just as an old vacuum-tube radio requires some time to warm up (as discussed in an online forum here) so that radio signals are not distorted, a telescope needs to equilibrate to the condition of the air around it, so that sky images are not distorted.
On the Webb Space Telescope's observing:
While the Webb scope is already equilibrated to its harsh environment in outer space, its recent imagery of Jupiter (see here) is stunning to astronomers, showing detail of clouds and auroral activity. That the Webb Telescope takes pictures in the infrared, its images must be made visible as shades of gray and then colorized in the visual spectrum for us to be able to view them.
On ways to observe:
Whether with telescope or binocular, any optical aid to view the night sky should be steady. A good mount for a scope or for a binocular is essential, such as a monopod, or, even a homemade walking stick that can double as a mount.
On places to observe:
During the warm months of the year, it's good to get out under the stars at a star party. Even if you don't own a telescope, star parties are also good places to look through others' scopes, or, to take your portable rig for some remote QRP. (Here's an example where the star party meets ham radio.)
If you really want to take up serious stargazing under dark skies, Glenn KD9PNY suggests taking in some of the dark-sky sites across the USA. On a more formal basis, there are even premier dark-sky sites set up by, or affiliated with, the International Dark Sky Association. (Here's an example of one such set up in Ohio; at the time, Roy KD9RSE had some small involvement with its set-up.)
Getting out under the stars can be exhilarating, if you've not had the chance to see truly dark skies. Greg KD9HOK related just such an account from his family's trips to the vicinity of Rhinelander, WI.
Closer to home and within the range of the KA9QJG repeater's coverage area, hams may be able to visit a nearby star party, and, in the Midwest. The Illinois Dark Skies Star Party meets every year in late Summer or early Autumn at the Panther Creek nature preserve; its next star party is next month.
While observing no matter where you go, too, be alert for curious wildlife that may want to inspect you and your observing site.
On other sky activity:
Dan K9SGA wondered about recent reports of satellite or space station debris, and, its potential to fall back to Earth. A recent post by Randy KD9WBE to the news group linked to video about this. Don KA9QJG wondered about the influence of celestial line-ups on earthly events. For example, when planets line up, is there a potential effect on Earth?
Planetary line-ups appear to be of two kinds; that is, planets appear in the night sky all the time, and, on occasion, also appear to line up across the sky as seen from our vantage on Earth; this is not unusual. But as part of modern superstition or as seen in apocalyptic movies, another kind of planetary line-up occurs to wreak havoc on Earth; in actuality, this is unlikely. An explanation at this link indicates the unlikelihood of any disastrous effect from these latter line-ups.
As far as lunar “line-ups”, that is, whether there is a connection between the appearance of a Full Moon and a rise in childbirth or crime, there is little evidence to suggest that connection, at least as described here and here, though there is still some skepticism. One's own experience often reinforces the perception of night-sky events and their tie to daily happenings.
As far as an actual connection to earthly happenings, the Moon does not only influence the patterns of shoreline tides, but the phase of the Full Moon also appears to coincide with volcanic eruptions, at least there is some speculation in this instance.
And, finally, this particular Astro Net did not have a specific mention of the Space Weather Woman; but, one can listen to one of her more recent presentations at this link.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KC9ER Ricky
KC9CHS Mark
K9PZ Brandon
KA9QJG Don
W9ABN Ed
K9SGA Dan
KD9HOK Greg
The Astro Net airs every second and fourth week of the month, on Wednesday of those weeks. Tune in to the next Astro Net on Wednesday, September 7, 2022, at 7:00 p.m.
In the meantime, keep watching the skies.
Astro Net recap, for August 10, 2022
Highlights from on-the-air ham radio transmission on 147.045 MHz
For the 8th installment of the Astro Net on 8/10/2022, here is a summary (not a transcript) of topics, highlighting items of current interest.
On meteor activity:
This week in August welcomes the Perseid meteor shower, which is an expected, annual display of meteors, i.e., bits of rock and dust that collide at high speed with Earth’s upper atmosphere, burn up, and leave a trail of ionized gas in their wake. Presumably, the debris left behind from the last passage of the Comet Swift-Tuttle in our Solar System, the Perseids usually do not disappoint for fairly bright streaks, smoky trails, and the occasional fireball.
This particular shower peaks on or about August 12 every year, though meteors can be seen on clear nights, generally after midnight locally, leading up to that date. As Paul KF9ER observed, observing this shower (like any meteor shower) away from city lights may improve their viewing.
From the perspective of ham radio, meteor showers can offer the prospect of pursuing meteor scatter; that is, the chance of using the ionized wake of meteors to reflect radio signals. (A couple posts already to the news group have links to explain this activity.) Shad KD9EJE had asked about this mode of propagation.
Perhaps not beyond the ability of some hams who use the KA9QJG repeater, the successful set-up for detection of meteor scatter does require experience and coordination (see a description at this link); Jim W9ROM attested to its relative complexity and expense to perform it successfully.
On remembering Nichelle Nichols:
Glenn KD9PNY offered a retrospective on the recent passing of Nichelle Nichols, best known for her role as Lieutenant Uhura on the original Star Trek series.
On lunar activity:
Visible this month as a so-called Supermoon, the Moon at its full phase does indeed coincide with the Perseid peak and may diminish the sighting of faint meteors; but, our nearest celestial neighbor is still worth a look through a binocular or a small telescope. In folklore, the Full Moon in August is known as the Full Sturgeon Moon, in response to a query from Henry KA9GKT about that name.
On the planets this week:
The planets have spread across the sky from their earlier pre-dawn line-up last Spring; so, look for ringed Saturn due south by about midnight. Saturn reaches opposition by mid-August, which means it's opposite the Sun in the sky and can be best viewed through a good telescope or big binocular at that time. Look for bright Jupiter high in the southeast sky by midnight, too. Of course, both planets can be observed earlier in the evening after sunset.
On things that orbit:
What goes up ought to come down. Don KA9QJG asked what it takes for a rocket to achieve and stay in orbit (explained here), but more to the point, how the Russians, for example, can launch a satellite (named Kosmos 2558) and have it “sit beneath” and stalk a U.S. satellite (named USA 326).
This kind of orbit would need adequate lift at launch and fast enough forward momentum for the Russian satellite in a lower orbit to keep pace with the US satellite in a higher orbit. The article at this link highlights this maneuver. Staying in the same orbital plane of another satellite can be tricky, too (says the article), especially if the satellites are close to each other in outer space.
As likely spy satellites, they may be "parked" (though the link, above, doesn't say) in a high geosynchronous orbit, so that the satellite has a commanding view and orbits as fast as Earth rotates. If the satellite were "parked" over the equator, though, it'd be called a geostationary orbit (which is still a geosynchronous orbit; here's the description of both kinds).
SpaceX has been used more and more to deliver satellites to Earth orbit and astronauts to the International Space Station, including Starlink satellites; these can be tracked across the sky for a ham's particular location (here or here).
On tumbling rocket bodies:
There's plenty of space junk up there, too, from Russians, Chinese, and the US. That's what Mark KC9CHS had wondered. Some of it in low orbit may come tumbling down, if the junk loses momentum over time due to upper-air drag. Or it may be deliberately destroyed in orbit, creating a space hazard. Henry KA9GKT reminded the Net that the Russians did indeed destroy one their former spy satellites last year (read it here), the 1500 large pieces of which could imperil the ISS.
On space oddities and other things:
While hams may be interested in auroras or the ionized trails of meteor debris to reflect radio waves, another phenomenon, visible to observers in recent years and resembling an aurora, might one day be a candidate to examine for radio propagation, though it's elusive and unexplained. Known as STEVE (for Strong Thermal Emission Velocity Enhancement), this colorful phenomenon appears as an aurora, but, according to scientists, may be a very hot gas trail cutting through the upper atmosphere. Its origin is unknown.
On things both elusive and unexplained, Henry KA9GKT and Don KA9QJG reminded the Net of a ham net that's been used a while to discuss UFO and other things (at this link).
And, finally, an Astro Net might not be complete without a word from the Space Weather Woman, whose podcast Don KA9QJG played for the Net.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KD9EJE Shad
KA9QJG Don
W9ABN Ed
KA9GKT Henry
KF9ER Paul
KC9CHS Mark
KA9EFD Allan
KD9GHO Stuart
KD9VBE Randy
W9JOM Jim
K9SGA Dan
KC9MDS Bill
KD9UOW David
K9PZ Brandon
KD9HOK Greg (mobile)
KE8NLE Mike (by email)
The Astro Net airs every second and fourth week of the month, on Wednesday of those weeks. Tune in to the next Astro Net on Wednesday, August 24, 2022, at 7:00 p.m.
In the meantime, keep watching the skies.
On meteor activity:
This week in August welcomes the Perseid meteor shower, which is an expected, annual display of meteors, i.e., bits of rock and dust that collide at high speed with Earth’s upper atmosphere, burn up, and leave a trail of ionized gas in their wake. Presumably, the debris left behind from the last passage of the Comet Swift-Tuttle in our Solar System, the Perseids usually do not disappoint for fairly bright streaks, smoky trails, and the occasional fireball.
This particular shower peaks on or about August 12 every year, though meteors can be seen on clear nights, generally after midnight locally, leading up to that date. As Paul KF9ER observed, observing this shower (like any meteor shower) away from city lights may improve their viewing.
From the perspective of ham radio, meteor showers can offer the prospect of pursuing meteor scatter; that is, the chance of using the ionized wake of meteors to reflect radio signals. (A couple posts already to the news group have links to explain this activity.) Shad KD9EJE had asked about this mode of propagation.
Perhaps not beyond the ability of some hams who use the KA9QJG repeater, the successful set-up for detection of meteor scatter does require experience and coordination (see a description at this link); Jim W9ROM attested to its relative complexity and expense to perform it successfully.
On remembering Nichelle Nichols:
Glenn KD9PNY offered a retrospective on the recent passing of Nichelle Nichols, best known for her role as Lieutenant Uhura on the original Star Trek series.
On lunar activity:
Visible this month as a so-called Supermoon, the Moon at its full phase does indeed coincide with the Perseid peak and may diminish the sighting of faint meteors; but, our nearest celestial neighbor is still worth a look through a binocular or a small telescope. In folklore, the Full Moon in August is known as the Full Sturgeon Moon, in response to a query from Henry KA9GKT about that name.
On the planets this week:
The planets have spread across the sky from their earlier pre-dawn line-up last Spring; so, look for ringed Saturn due south by about midnight. Saturn reaches opposition by mid-August, which means it's opposite the Sun in the sky and can be best viewed through a good telescope or big binocular at that time. Look for bright Jupiter high in the southeast sky by midnight, too. Of course, both planets can be observed earlier in the evening after sunset.
On things that orbit:
What goes up ought to come down. Don KA9QJG asked what it takes for a rocket to achieve and stay in orbit (explained here), but more to the point, how the Russians, for example, can launch a satellite (named Kosmos 2558) and have it “sit beneath” and stalk a U.S. satellite (named USA 326).
This kind of orbit would need adequate lift at launch and fast enough forward momentum for the Russian satellite in a lower orbit to keep pace with the US satellite in a higher orbit. The article at this link highlights this maneuver. Staying in the same orbital plane of another satellite can be tricky, too (says the article), especially if the satellites are close to each other in outer space.
As likely spy satellites, they may be "parked" (though the link, above, doesn't say) in a high geosynchronous orbit, so that the satellite has a commanding view and orbits as fast as Earth rotates. If the satellite were "parked" over the equator, though, it'd be called a geostationary orbit (which is still a geosynchronous orbit; here's the description of both kinds).
SpaceX has been used more and more to deliver satellites to Earth orbit and astronauts to the International Space Station, including Starlink satellites; these can be tracked across the sky for a ham's particular location (here or here).
On tumbling rocket bodies:
There's plenty of space junk up there, too, from Russians, Chinese, and the US. That's what Mark KC9CHS had wondered. Some of it in low orbit may come tumbling down, if the junk loses momentum over time due to upper-air drag. Or it may be deliberately destroyed in orbit, creating a space hazard. Henry KA9GKT reminded the Net that the Russians did indeed destroy one their former spy satellites last year (read it here), the 1500 large pieces of which could imperil the ISS.
On space oddities and other things:
While hams may be interested in auroras or the ionized trails of meteor debris to reflect radio waves, another phenomenon, visible to observers in recent years and resembling an aurora, might one day be a candidate to examine for radio propagation, though it's elusive and unexplained. Known as STEVE (for Strong Thermal Emission Velocity Enhancement), this colorful phenomenon appears as an aurora, but, according to scientists, may be a very hot gas trail cutting through the upper atmosphere. Its origin is unknown.
On things both elusive and unexplained, Henry KA9GKT and Don KA9QJG reminded the Net of a ham net that's been used a while to discuss UFO and other things (at this link).
And, finally, an Astro Net might not be complete without a word from the Space Weather Woman, whose podcast Don KA9QJG played for the Net.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy
KD9PNY Glenn
KD9EJE Shad
KA9QJG Don
W9ABN Ed
KA9GKT Henry
KF9ER Paul
KC9CHS Mark
KA9EFD Allan
KD9GHO Stuart
KD9VBE Randy
W9JOM Jim
K9SGA Dan
KC9MDS Bill
KD9UOW David
K9PZ Brandon
KD9HOK Greg (mobile)
KE8NLE Mike (by email)
The Astro Net airs every second and fourth week of the month, on Wednesday of those weeks. Tune in to the next Astro Net on Wednesday, August 24, 2022, at 7:00 p.m.
In the meantime, keep watching the skies.
Astro Net recap, for July 20, 2022
Highlights from on-the-air ham radio transmission on 147.045 MHz
For the 7th installment of the Astro Net on 7/20/2022, a number of items of current interest.
On solar activity:
The Sun revved up in recent days, and sloughed off a barrage of material to head our way. This activity raised solar indices, as reported by the Space Weather Woman in her latest installment (for this date at this link); but, for now, these indices have returned to the "green," meaning that radio propagation might not be overly disrupted.
To understand various kinds of solar activity, the NOAA has several categories at this link, to describe types of storms in space weather, namely, radio blackouts (the R scale), solar radiation storms (the S scale), and geomagnetic storms (the G scale). Day-to-day variations in the R, S, and G scales are found here (observed vs. predicted) and here (in colorized format for the different scales in storm types, as shown week-to-week).
As hams may keep track of solar activity, numbers of sunspots can also affect propagation. Sunspots for any given day are tallied as part of a sunspot-number formula; but, be aware that NOAA (for the USA) has its own daily, published value, which is (as reported at the link) about 25% higher than the "international" value reported out of Belgium.
When astronomers talk of sunspots, they will group them in cycles; as hams know, we're currently in Cycle 25. But each cycle, according to astronomers, starts when sunspots are seen at high solar latitudes and ends as sunspots group toward the Sun's equator (as detailed at this link); also, the polarity of the Sun's magnetic field changes, which can be detected by examining the spectrum of sunspots.
As hams have anticipated a strong Cycle 25, predictions vary. Here's one such prediction at this link, which places Cycle 25's strength no better than Cycle 24. (But, remember, when it comes to great expectations from predictions, it's only a model).
On commemorating Apollo 11:
On this date (7/20) for this Astro Net, we commemorated the anniversary of the first landing on the Moon by Apollo 11. Glenn KD9PNY reviewed highlights of the stunning, first lunar-landing mission, where Astronauts Neil Armstrong, Edwin "Buzz" Aldrin, and Michael Collins, made history as the trio to visit the Moon in 1969. The historic mission landed on the Moon's surface and returned home safely, and, with rock-hard evidence of the mission's success. Today, one can even touch a sample of that evidence on display. (In subsequent years after Apollo 11, dust also brought back from the Moon was found to have some potential agricultural properties.)
Don KA9QJG reminded hams on the net that the characteristic "beeps" from the KA9QJG repeater are the same Quindar tones that NASA has used during its radio communications with astronauts.
On other lunar activity:
If you want to check out the Moon this week, see it at its waning crescent phase (as of this Astro Net date). As always, our nearest celestial neighbor in space offers some good observation with a binocular or small telescope.
If you have some decent optical aid, you too can snap pix of the Moon with your cell phone, with the assist of a device like one of these, which helps to place the phone up to a telescope or a binocular mounted on a steady support.
Don KA9QJG wondered about the position of the Moon in the sky due to its orbit, and its apparent color at various times.
In response, the Moon does have a complex orbit, due to its tilt relative to Earth's equator and the plane of Earth's orbit (also known as the ecliptic). Due to the tilt of the Earth in space and the Moon's own orbital inclination, the position of the Moon in the sky changes with the seasons; for example, the Moon appears to ride high in the sky in Winter and Spring and ride low in the sky in Summer and Fall.
Also, the Moon appears to have some color at times. It can be the color yellow, orange, red, or even blue. Though the Moon is essentially various shades of gray (due to its soil), on rising or setting the Moon can appear orangey in color, for the same reason the Sun can be seen as reddish on its rising or setting. That is, some of the visible light from the Moon (or from the Sun), as it passes through the atmosphere, can get absorbed, leaving just the long visible-light wavelengths of red and orange to reach our eyes (as described at this link).
On the planet line-up:
One can still view the ongoing line-up of planets across the east-southeast sky in the morning before sunup, which KD9IQU Nick reported seeing on his way to work.
On other NASA news:
The Webb Space Telescope has debuted some of its first images at this link.
And one more thing:
As an aside, there has been some unfortunate distortion of ham radio signals, heard variously as choppy Rx, echoes, occasional hammering, or repeated popping. Don KA9QJG reports that Jim W9JOM described this distortion as "multipath propagation". Here's a description and an audio sample at this link.
Thanks to all who checked in to the Astro Net ~
KD9RSDE Roy
KD9PNY Glenn
KA9QJG Don
KB9HO Russ
KD9OKX Brandon
N9TES Rick
KA9EFD Allan
K9SGA Dan
KD9UOW David
KD9SDU Dave
KK7CCD Don
KD9DCP Phil
KD9IQU Nick
The Astro Net airs every second and fourth week of the month, on Wednesday of those weeks. Tune in to the next Astro Net on Wednesday, August 10, 2022, at 7:00 p.m.
In the meantime, keep watching the skies.
On solar activity:
The Sun revved up in recent days, and sloughed off a barrage of material to head our way. This activity raised solar indices, as reported by the Space Weather Woman in her latest installment (for this date at this link); but, for now, these indices have returned to the "green," meaning that radio propagation might not be overly disrupted.
To understand various kinds of solar activity, the NOAA has several categories at this link, to describe types of storms in space weather, namely, radio blackouts (the R scale), solar radiation storms (the S scale), and geomagnetic storms (the G scale). Day-to-day variations in the R, S, and G scales are found here (observed vs. predicted) and here (in colorized format for the different scales in storm types, as shown week-to-week).
As hams may keep track of solar activity, numbers of sunspots can also affect propagation. Sunspots for any given day are tallied as part of a sunspot-number formula; but, be aware that NOAA (for the USA) has its own daily, published value, which is (as reported at the link) about 25% higher than the "international" value reported out of Belgium.
When astronomers talk of sunspots, they will group them in cycles; as hams know, we're currently in Cycle 25. But each cycle, according to astronomers, starts when sunspots are seen at high solar latitudes and ends as sunspots group toward the Sun's equator (as detailed at this link); also, the polarity of the Sun's magnetic field changes, which can be detected by examining the spectrum of sunspots.
As hams have anticipated a strong Cycle 25, predictions vary. Here's one such prediction at this link, which places Cycle 25's strength no better than Cycle 24. (But, remember, when it comes to great expectations from predictions, it's only a model).
On commemorating Apollo 11:
On this date (7/20) for this Astro Net, we commemorated the anniversary of the first landing on the Moon by Apollo 11. Glenn KD9PNY reviewed highlights of the stunning, first lunar-landing mission, where Astronauts Neil Armstrong, Edwin "Buzz" Aldrin, and Michael Collins, made history as the trio to visit the Moon in 1969. The historic mission landed on the Moon's surface and returned home safely, and, with rock-hard evidence of the mission's success. Today, one can even touch a sample of that evidence on display. (In subsequent years after Apollo 11, dust also brought back from the Moon was found to have some potential agricultural properties.)
Don KA9QJG reminded hams on the net that the characteristic "beeps" from the KA9QJG repeater are the same Quindar tones that NASA has used during its radio communications with astronauts.
On other lunar activity:
If you want to check out the Moon this week, see it at its waning crescent phase (as of this Astro Net date). As always, our nearest celestial neighbor in space offers some good observation with a binocular or small telescope.
If you have some decent optical aid, you too can snap pix of the Moon with your cell phone, with the assist of a device like one of these, which helps to place the phone up to a telescope or a binocular mounted on a steady support.
Don KA9QJG wondered about the position of the Moon in the sky due to its orbit, and its apparent color at various times.
In response, the Moon does have a complex orbit, due to its tilt relative to Earth's equator and the plane of Earth's orbit (also known as the ecliptic). Due to the tilt of the Earth in space and the Moon's own orbital inclination, the position of the Moon in the sky changes with the seasons; for example, the Moon appears to ride high in the sky in Winter and Spring and ride low in the sky in Summer and Fall.
Also, the Moon appears to have some color at times. It can be the color yellow, orange, red, or even blue. Though the Moon is essentially various shades of gray (due to its soil), on rising or setting the Moon can appear orangey in color, for the same reason the Sun can be seen as reddish on its rising or setting. That is, some of the visible light from the Moon (or from the Sun), as it passes through the atmosphere, can get absorbed, leaving just the long visible-light wavelengths of red and orange to reach our eyes (as described at this link).
On the planet line-up:
One can still view the ongoing line-up of planets across the east-southeast sky in the morning before sunup, which KD9IQU Nick reported seeing on his way to work.
On other NASA news:
The Webb Space Telescope has debuted some of its first images at this link.
And one more thing:
As an aside, there has been some unfortunate distortion of ham radio signals, heard variously as choppy Rx, echoes, occasional hammering, or repeated popping. Don KA9QJG reports that Jim W9JOM described this distortion as "multipath propagation". Here's a description and an audio sample at this link.
Thanks to all who checked in to the Astro Net ~
KD9RSDE Roy
KD9PNY Glenn
KA9QJG Don
KB9HO Russ
KD9OKX Brandon
N9TES Rick
KA9EFD Allan
K9SGA Dan
KD9UOW David
KD9SDU Dave
KK7CCD Don
KD9DCP Phil
KD9IQU Nick
The Astro Net airs every second and fourth week of the month, on Wednesday of those weeks. Tune in to the next Astro Net on Wednesday, August 10, 2022, at 7:00 p.m.
In the meantime, keep watching the skies.
Astro Net recap, for July 6, 2022
Highlights from on-the-air ham radio transmission on 147.045 MHz
For the 6th installment of the Astro Net on 7/6/2022, a few items of interest.
On lunar activity:
With the Moon at its waxing crescent phase (as of this Astro Net date), our nearest celestial neighbor in space offers some good observation with a binocular or small telescope. Light and shadow across the Moon's surface every month show an array of crater walls and mountain ranges.
As the Moon revolves around Earth, we see it move, from night-to-night, farther east in our sky, which makes the time of moonrise about 52 minutes later each night of the month. Or, as Glenn KD9PNY puts it, the Moon appears to the left (of where it was the previous night), about the width of one's fist held at arm length's and aimed at the sky.
For the phase of Full Moon this month (on 7/13), known in folklore as the Full Buck Moon, this will also be a so-called Supermoon, which means that the full phase coincides with the Moon's monthly closest approach to Earth, making the Full Moon appear slightly larger and brighter than usual.
As far as the Moon appearing larger, that recurs during a Supermoon; but that may not always be the case. Ron K9JON indicated that the Moon is receding, and asked what may become of the Moon in the far future. Indeed, as the Moon recedes in its revolution around Earth, our Earth will slow in its rotation, making for a longer day and a lessening of tides. (A couple billion years hence, there'll be more hours in the day for ragchewing.)
As of now, the Moon does rotate, though slowly; the Moon's rotation matches its revolution. That is, the Moon rotates in the same amount of time that it takes to revolve around Earth; so, the Moon always seems to present the same side to us on Earth.
As for myths about the Moon, some spring from superstition; other lunar influences are largely anecdotal, but some beliefs may have some statistical basis, depending on how one accounts for the phenomenon being studied.
To some degree, according to speculation and some studies (found at this link) the Moon's phases appear to coincide with women's biology. And while the effect of the Moon's tidal forces that moves water along shorelines may also influence fall of water from cloudy skies, those same forces appear not to induce the fall of water from women's eyes.
On solar activity:
The Sun has been "quiet" recently; so, not much to report on any disruptions from excessive solar activity. That is, certain solar indices have recently been fairly in the "green", meaning that radio propagation may not have been disrupted recently by solar flares.
John W9YOU suggested that radio propagation can be enhanced across the greyline, a radio window of opportunity along a band over Earth where the Sun is seen to rise and set. To show its use, he's already prepared several posts and links in the news group. Since these links can require the use of FT8, it was suggested that perhaps a future Tech Net can be dedicated to the set-up and operation of FT8.
On planet line-up:
One can still view the ongoing planetary line-up, seen across the east-southeast sky, in the morning before sunup.
On outside activities:
As a follow-up to Field Day (hosted recently by N9TAX, maker of the Slim Jim antenna), there were no astronomical observations, as thunderstorms over Hebron, Indiana, prevented any telescope set-up.
On NASA and what's ahead:
Glenn KD9PNY described some interesting items about NASA, its background and origin, its rise and mission, and its far-flung facilities. At the next Astro Net, July 20, we'd like to present some background on the first Moon landing, which occurred on that date 53 years ago.
Thanks to all who checked in to the Astro Net ~
KD9RSDE Roy
KD9PNY Glenn
KD9UDL Steve
KA9EFD Allan
W9ABN Ed
KA9QJG Don
KD9IQU Nick
W9YOU John
KD9OKX Brandon
K9JON Ron
N9IQ Steve
KD9UOW David
KC9MDS Bill
KA9GKT Henry
Tune in to the next Astro Net on Wednesday, July 20, 2022, at 7:00 p.m.
In the meantime, keep watching the skies.
On lunar activity:
With the Moon at its waxing crescent phase (as of this Astro Net date), our nearest celestial neighbor in space offers some good observation with a binocular or small telescope. Light and shadow across the Moon's surface every month show an array of crater walls and mountain ranges.
As the Moon revolves around Earth, we see it move, from night-to-night, farther east in our sky, which makes the time of moonrise about 52 minutes later each night of the month. Or, as Glenn KD9PNY puts it, the Moon appears to the left (of where it was the previous night), about the width of one's fist held at arm length's and aimed at the sky.
For the phase of Full Moon this month (on 7/13), known in folklore as the Full Buck Moon, this will also be a so-called Supermoon, which means that the full phase coincides with the Moon's monthly closest approach to Earth, making the Full Moon appear slightly larger and brighter than usual.
As far as the Moon appearing larger, that recurs during a Supermoon; but that may not always be the case. Ron K9JON indicated that the Moon is receding, and asked what may become of the Moon in the far future. Indeed, as the Moon recedes in its revolution around Earth, our Earth will slow in its rotation, making for a longer day and a lessening of tides. (A couple billion years hence, there'll be more hours in the day for ragchewing.)
As of now, the Moon does rotate, though slowly; the Moon's rotation matches its revolution. That is, the Moon rotates in the same amount of time that it takes to revolve around Earth; so, the Moon always seems to present the same side to us on Earth.
As for myths about the Moon, some spring from superstition; other lunar influences are largely anecdotal, but some beliefs may have some statistical basis, depending on how one accounts for the phenomenon being studied.
To some degree, according to speculation and some studies (found at this link) the Moon's phases appear to coincide with women's biology. And while the effect of the Moon's tidal forces that moves water along shorelines may also influence fall of water from cloudy skies, those same forces appear not to induce the fall of water from women's eyes.
On solar activity:
The Sun has been "quiet" recently; so, not much to report on any disruptions from excessive solar activity. That is, certain solar indices have recently been fairly in the "green", meaning that radio propagation may not have been disrupted recently by solar flares.
John W9YOU suggested that radio propagation can be enhanced across the greyline, a radio window of opportunity along a band over Earth where the Sun is seen to rise and set. To show its use, he's already prepared several posts and links in the news group. Since these links can require the use of FT8, it was suggested that perhaps a future Tech Net can be dedicated to the set-up and operation of FT8.
On planet line-up:
One can still view the ongoing planetary line-up, seen across the east-southeast sky, in the morning before sunup.
On outside activities:
As a follow-up to Field Day (hosted recently by N9TAX, maker of the Slim Jim antenna), there were no astronomical observations, as thunderstorms over Hebron, Indiana, prevented any telescope set-up.
On NASA and what's ahead:
Glenn KD9PNY described some interesting items about NASA, its background and origin, its rise and mission, and its far-flung facilities. At the next Astro Net, July 20, we'd like to present some background on the first Moon landing, which occurred on that date 53 years ago.
Thanks to all who checked in to the Astro Net ~
KD9RSDE Roy
KD9PNY Glenn
KD9UDL Steve
KA9EFD Allan
W9ABN Ed
KA9QJG Don
KD9IQU Nick
W9YOU John
KD9OKX Brandon
K9JON Ron
N9IQ Steve
KD9UOW David
KC9MDS Bill
KA9GKT Henry
Tune in to the next Astro Net on Wednesday, July 20, 2022, at 7:00 p.m.
In the meantime, keep watching the skies.
Astro Net recap, for June 22, 2022
Highlights from on-the-air ham radio transmission on 147.045 MHz
For the 5th installment of the Astro Net on 6/22/2022, we covered a good number of topics.
On solar activity:
As the radiation output of the Sun is so critical to its effect ham radio propagation, Roy KD9RSE and Glenn KD9PNY presented the latest status on current solar activity, including the large, Earth-facing sunspot making its way across the solar disk
To emphasize its importance, Don KA9QJG played (later in the Net) a recent recording on that big sunspot and other solar phenomena, as presented by Tamitha Skov (aka Space Weather Woman and ham radio operator).
In response to a question by W9YOU on solar flares, the Net learned of their basic classification system and their potential effect on radio propagation. To drive home the point, the Carrington Event was briefly highlighted, as an example to show the possible extent of solar behavior on communications. Also, as part of the start of the Summer season, the net held a brief discussion about the significance of the solstice, its distinction from that of an equinox, and the reason for the seasons.
On the planet line-up:
Roy and Glenn reminded the net about getting up early to view the ongoing planetary line-up, seen across the east-southeast sky, in the morning before sunup.
On satellite activity:
Brandon KD9OKX reported brief, bright lights in the sky and assumed them to be satellites (which very likely they could have been). As in the previous Astro Net summary, looking up after sunset in Spring or Summer, one might notice a fast-moving star; this may likely be a satellite. Spotting satellites is easy to do with the naked eye. If you want to track large satellites, like the ISS, go to this link; be sure to type in your latitude/longitude.
On outside activities:
John W9YOU brought up the prospect of a visit to the Adler Planetarium, as it does host talks on sky observation (and used to hold classes in celestial navigation). Also, John reminded the net about plans for Field Day on the property of N9TAX (maker of the Slim Jim antenna), from Friday night to Sunday morning, 6/24 – 6/26. (Roy will attend with radio gear and will bring a telescope for nighttime observing, weather permitting).
On the atmosphere:
Don KA9QJG relayed a story about his receipt of a repeater signal from Arkansas last week, likely due to tropospheric ducting; but, one may be able to take advantage of its possibilities with this link, which provides forecast maps of tropo ducting (and this link allows reporting).
On sky observing and what's ahead:
Glenn described cool facts about the planet Jupiter and likely what one can see with a telescope, with a binocular, or with the unclothed eye. Both Net hosts described the Summer Triangle, as a sneak preview of coming attractions for the months ahead, now that the Summer Solstice, the astronomical beginning of Summer, has signaled this season's start.
Thanks to all who checked in to the Astro Net ~
KD9RSDE Roy
KD9PNY Glenn
W9ABN Ed
W9YOU John
KD9OKX Brandon
KD9UOW David
W9JOM Jim
KC9ADK Tony
KD9GHO Stewart
K9SGA Dan
KD9HOK Greg
N9IQ Steve
Tune in to the next Astro Net on Wednesday, July 13, 2022, at 7:00 p.m.
In the meantime, keep watching the skies.
On solar activity:
As the radiation output of the Sun is so critical to its effect ham radio propagation, Roy KD9RSE and Glenn KD9PNY presented the latest status on current solar activity, including the large, Earth-facing sunspot making its way across the solar disk
To emphasize its importance, Don KA9QJG played (later in the Net) a recent recording on that big sunspot and other solar phenomena, as presented by Tamitha Skov (aka Space Weather Woman and ham radio operator).
In response to a question by W9YOU on solar flares, the Net learned of their basic classification system and their potential effect on radio propagation. To drive home the point, the Carrington Event was briefly highlighted, as an example to show the possible extent of solar behavior on communications. Also, as part of the start of the Summer season, the net held a brief discussion about the significance of the solstice, its distinction from that of an equinox, and the reason for the seasons.
On the planet line-up:
Roy and Glenn reminded the net about getting up early to view the ongoing planetary line-up, seen across the east-southeast sky, in the morning before sunup.
On satellite activity:
Brandon KD9OKX reported brief, bright lights in the sky and assumed them to be satellites (which very likely they could have been). As in the previous Astro Net summary, looking up after sunset in Spring or Summer, one might notice a fast-moving star; this may likely be a satellite. Spotting satellites is easy to do with the naked eye. If you want to track large satellites, like the ISS, go to this link; be sure to type in your latitude/longitude.
On outside activities:
John W9YOU brought up the prospect of a visit to the Adler Planetarium, as it does host talks on sky observation (and used to hold classes in celestial navigation). Also, John reminded the net about plans for Field Day on the property of N9TAX (maker of the Slim Jim antenna), from Friday night to Sunday morning, 6/24 – 6/26. (Roy will attend with radio gear and will bring a telescope for nighttime observing, weather permitting).
On the atmosphere:
Don KA9QJG relayed a story about his receipt of a repeater signal from Arkansas last week, likely due to tropospheric ducting; but, one may be able to take advantage of its possibilities with this link, which provides forecast maps of tropo ducting (and this link allows reporting).
On sky observing and what's ahead:
Glenn described cool facts about the planet Jupiter and likely what one can see with a telescope, with a binocular, or with the unclothed eye. Both Net hosts described the Summer Triangle, as a sneak preview of coming attractions for the months ahead, now that the Summer Solstice, the astronomical beginning of Summer, has signaled this season's start.
Thanks to all who checked in to the Astro Net ~
KD9RSDE Roy
KD9PNY Glenn
W9ABN Ed
W9YOU John
KD9OKX Brandon
KD9UOW David
W9JOM Jim
KC9ADK Tony
KD9GHO Stewart
K9SGA Dan
KD9HOK Greg
N9IQ Steve
Tune in to the next Astro Net on Wednesday, July 13, 2022, at 7:00 p.m.
In the meantime, keep watching the skies.
Astro Net recap, for June 8, 2022
Highlights from on-the-air ham radio transmission on 147.045 MHz
For the 4th installment of the Astro Net on 6/8/2022, we covered a number of timely topics.
Solar activity:
Generally good to start each Net with the latest solar activity, as it affects ham radio operation. In recent days, as of this writing, the Sun has been "quiet" with no significant outbursts, according to this website. It’s good, too, to see the various measure of solar activity, including visual inspection at various wavelengths. One can get a view of the Sun in various wavelengths, which can show significant detail, at this NASA SOHO website, which Glenn KD9PNY recommends.
For ham operators, we can view the Sun, safely and briefly to look for large sunspots, with the unaided eye and the use of a welder’s #14 faceplate. (Its past use for viewing the lead-up to a solar eclipse found here). The #14 faceplate is not always a stock item; one may need to order it in advance. (Buy one here or here.)
For viewing the Sun safely through a telescope, one can use a solar filter (like this) that attaches to sky-aimed end of a telescope (which gives this kind of view) or use a special "hydrogen-alpha" filter assembly that filters out all light except for the Sun’s hydrogen light (which gives this kind of view).
If one does not use extreme caution and take precautions to protect eyesight, one could end up with a spot on the eye or permanent damage. Galileo, one of several (but not the first) in his time to use a telescope, did point his homemade telescope at the Sun, which may have caused a spot on his eye from looking briefly at the Sun (but actually he later went blind from glaucoma).
Lunar activity:
For specific observations this Summer, for the months of June, July, and August, weather permitting, we’ll see a Supermoon. This is when the Full Moon phase coincides with the closest approach of the Moon to Earth; the Moon can appear slightly larger and brighter at this time than at other times. (This same effect can happen at New Moon phase, but one usually cannot see that phase.)
Also asked during the Net was why a rising Moon appears large and orange. (Read why at this link.) What appears to be a widespread optical illusion that all see, the Moon’s size stays the same whether seen near the horizon or high in the sky.
Satellite activity:
Simply looking up after sunset in Spring or Summer, one might notice a fast-moving star; this may likely be a satellite. Spotting satellites is easy to do with the naked eye. If you want to track large satellites, like the ISS, go to this link; be sure to type in your latitude/longitude. (Look in the news-group messages for apps already posted by W9YOU for sky-watching and by KD9UOW for satellite-tracking.)
Celestial navigation:
Important to know one’s position, we discussed bright stars used for navigation and the use of the sextant to take angular heights of stars and the Sun above the horizon, to determine a line of position. W9YOU already has posted links in the news-group messages on navigation stars and sextant use. It’s interesting for sky observers, whether on land or water, to know how soon one can see sky objects before sunrise or after sunset. Described during the Net were the three defined kinds of twilight: civil, nautical, and astronomical twilight. These are actually convenient ways to know how far below your local horizon may be the Sun, before sunup or after sundown.
Telescope use:
Some (like Russ KB9HO) wanted like to know about telescopes, and, how to use them better. If you have a ‘scope or want to buy a ‘scope, we can discuss those things at a future Net. In the meantime, here’s an overview on kinds of telescopes and their uses. There are many kinds, usually a variation on a theme and each is suited to a specific use; so, it’ll be good which one can work best for you.
If you really want to try before you buy, hams may want visit a star party this Summer; amateur astronomers are glad to let you look through their ‘scopes. Here’s a list of the more popular venues. A star party is like a hamfest, but with many telescopes, and usually good food. (And hams also show up at star parties to set up a remote station.)
As an example of a star party, the Net briefly presented Stellafane, the brainchild of famed amateur telescope maker, Russell Porter (machinist, Arctic explorer, pencil artist), who showed what amateurs could teach the professionals in crafting good instrumentation.
Other items:
Brandon KD9OKX had asked about the phenomenon of stars' twinkling (known as scintillation), observing that it's more pronounced near the horizon for stars, but not so much for extended objects, like planets.
In making the rounds on this Net, several wanted to know how to know when objects are seen in the sky. Since celestial objects follow distinct, regular patterns, one can predict with a high degree of accuracy the seasonal appearance of bright stars and nearby planets. As an example, over the centuries these patterns were known as heliacal risings (or, rising ahead of the Sun), which were important more often in ancient cultures than today, but still a good guide to get to know stars and planets.
Glenn KD9PNY finished up the Net with an acknowledgement of a June (1963) anniversary of the first woman in space, Valentina Tereshkova, who spent three days in outer space aboard a Vostok 6 spacecraft. At this link is a summary debriefing of her experience, including the quality of radio communications during her orbital flight.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy, Flossmoor, IL
KD9PNFY Glenn, Chicago (Hegewisch), IL
W9ABN Ed, Schererville, IN
KD9OKX, Brandon, Lowell, IN
KB9HO Russ, De Motte, IN
KB9TEQ Eddie, Gary, IN
K9SGA Dan, Lake Station, IN
KA9QJG Don, Hammond, IN
KD9UOW David, Hobart, IN
N9IQ, Steve, Saint John, IN
KK7CCD, Don, Saint John, IN
Solar activity:
Generally good to start each Net with the latest solar activity, as it affects ham radio operation. In recent days, as of this writing, the Sun has been "quiet" with no significant outbursts, according to this website. It’s good, too, to see the various measure of solar activity, including visual inspection at various wavelengths. One can get a view of the Sun in various wavelengths, which can show significant detail, at this NASA SOHO website, which Glenn KD9PNY recommends.
For ham operators, we can view the Sun, safely and briefly to look for large sunspots, with the unaided eye and the use of a welder’s #14 faceplate. (Its past use for viewing the lead-up to a solar eclipse found here). The #14 faceplate is not always a stock item; one may need to order it in advance. (Buy one here or here.)
For viewing the Sun safely through a telescope, one can use a solar filter (like this) that attaches to sky-aimed end of a telescope (which gives this kind of view) or use a special "hydrogen-alpha" filter assembly that filters out all light except for the Sun’s hydrogen light (which gives this kind of view).
If one does not use extreme caution and take precautions to protect eyesight, one could end up with a spot on the eye or permanent damage. Galileo, one of several (but not the first) in his time to use a telescope, did point his homemade telescope at the Sun, which may have caused a spot on his eye from looking briefly at the Sun (but actually he later went blind from glaucoma).
Lunar activity:
For specific observations this Summer, for the months of June, July, and August, weather permitting, we’ll see a Supermoon. This is when the Full Moon phase coincides with the closest approach of the Moon to Earth; the Moon can appear slightly larger and brighter at this time than at other times. (This same effect can happen at New Moon phase, but one usually cannot see that phase.)
Also asked during the Net was why a rising Moon appears large and orange. (Read why at this link.) What appears to be a widespread optical illusion that all see, the Moon’s size stays the same whether seen near the horizon or high in the sky.
Satellite activity:
Simply looking up after sunset in Spring or Summer, one might notice a fast-moving star; this may likely be a satellite. Spotting satellites is easy to do with the naked eye. If you want to track large satellites, like the ISS, go to this link; be sure to type in your latitude/longitude. (Look in the news-group messages for apps already posted by W9YOU for sky-watching and by KD9UOW for satellite-tracking.)
Celestial navigation:
Important to know one’s position, we discussed bright stars used for navigation and the use of the sextant to take angular heights of stars and the Sun above the horizon, to determine a line of position. W9YOU already has posted links in the news-group messages on navigation stars and sextant use. It’s interesting for sky observers, whether on land or water, to know how soon one can see sky objects before sunrise or after sunset. Described during the Net were the three defined kinds of twilight: civil, nautical, and astronomical twilight. These are actually convenient ways to know how far below your local horizon may be the Sun, before sunup or after sundown.
Telescope use:
Some (like Russ KB9HO) wanted like to know about telescopes, and, how to use them better. If you have a ‘scope or want to buy a ‘scope, we can discuss those things at a future Net. In the meantime, here’s an overview on kinds of telescopes and their uses. There are many kinds, usually a variation on a theme and each is suited to a specific use; so, it’ll be good which one can work best for you.
If you really want to try before you buy, hams may want visit a star party this Summer; amateur astronomers are glad to let you look through their ‘scopes. Here’s a list of the more popular venues. A star party is like a hamfest, but with many telescopes, and usually good food. (And hams also show up at star parties to set up a remote station.)
As an example of a star party, the Net briefly presented Stellafane, the brainchild of famed amateur telescope maker, Russell Porter (machinist, Arctic explorer, pencil artist), who showed what amateurs could teach the professionals in crafting good instrumentation.
Other items:
Brandon KD9OKX had asked about the phenomenon of stars' twinkling (known as scintillation), observing that it's more pronounced near the horizon for stars, but not so much for extended objects, like planets.
In making the rounds on this Net, several wanted to know how to know when objects are seen in the sky. Since celestial objects follow distinct, regular patterns, one can predict with a high degree of accuracy the seasonal appearance of bright stars and nearby planets. As an example, over the centuries these patterns were known as heliacal risings (or, rising ahead of the Sun), which were important more often in ancient cultures than today, but still a good guide to get to know stars and planets.
Glenn KD9PNY finished up the Net with an acknowledgement of a June (1963) anniversary of the first woman in space, Valentina Tereshkova, who spent three days in outer space aboard a Vostok 6 spacecraft. At this link is a summary debriefing of her experience, including the quality of radio communications during her orbital flight.
Thanks to all who checked in to the Astro Net ~
KD9RSE Roy, Flossmoor, IL
KD9PNFY Glenn, Chicago (Hegewisch), IL
W9ABN Ed, Schererville, IN
KD9OKX, Brandon, Lowell, IN
KB9HO Russ, De Motte, IN
KB9TEQ Eddie, Gary, IN
K9SGA Dan, Lake Station, IN
KA9QJG Don, Hammond, IN
KD9UOW David, Hobart, IN
N9IQ, Steve, Saint John, IN
KK7CCD, Don, Saint John, IN
Astro Net recap, for May 25, 2022
Highlights from on-the-air ham radio transmission on 147.045 MHz
For the 3rd installment of the Astro Net, we may have sounded rambling from one topic to another, but there was indeed order amid chaos as we knocked around the Solar System and chewed a little at the corners of the cosmos.
Glenn KD9PNY led off with "splashes from the Sun" about solar flares and CMEs, followed by my chattering about a smattering of radio interference from that bright orb in the sky.
From there we bandied back-and-forth about solar indices, and thanks to Jim W9JOM for offering a more distinct difference between the K-index versus the Kp-index, than what we'd described on-the-air.
Inspired by the planets that we see from time to time in our sky, Glenn offered up Mars for scrutiny, noting the recurrence of marsquakes on a ruddy world likely still active with tectonism left over from its earlier active age.
(For more about the Mars lander, named InSight, which detected the quakes, see the recent hour-long YouTube press conference by NASA, at this link.)
Btw, note from the Mars link (above) that the Red Planet will be at its best for observing this year by December 22.
From Mars to meteors, we noted the prospect of a potential "meteor storm" perhaps to start by late evening on Monday, May 30, or by early morning (from midnight till dawn) on May 31st.
This meteor shower, the Tau Herculids (named for the apparent point in the constellation Hercules, out of which meteors may seem to radiate), may be intense, hence the inclination to call it a meteor storm.
But if indeed those meteors are intense, it would be a fitting shower of tribute to silent keys, to be honored in a memorial net by Don KA9QJG, on the evening of Monday, May 30.
Several hams brought up unusual phenomena, which the Astro Net will likely want to explore in later installments; namely: aurora radio propagation, on which Jim W9JOM described his experience at making a contact using this technique; ball lightning and St. Elmo's Fire, both of which Al KK9F relayed to us; and, meteor scatter, about which Don KA9QJG had a story of its actual practice by a fellow ham.
In addition to a reminder to have some decent optical aid for night-sky viewing, an Astro Net would not be complete without a mention of the Space Weather Woman (aka Dr. Tamitha Skov), who's also an amateur radio operator (WX6SWW).
Thanks to all for checking in!
Next Astro Net to be held on Wednesday, June 8, at 7:00 p. m. Tune in and key up. In the meantime, keep watching the skies.
Glenn KD9PNY led off with "splashes from the Sun" about solar flares and CMEs, followed by my chattering about a smattering of radio interference from that bright orb in the sky.
From there we bandied back-and-forth about solar indices, and thanks to Jim W9JOM for offering a more distinct difference between the K-index versus the Kp-index, than what we'd described on-the-air.
Inspired by the planets that we see from time to time in our sky, Glenn offered up Mars for scrutiny, noting the recurrence of marsquakes on a ruddy world likely still active with tectonism left over from its earlier active age.
(For more about the Mars lander, named InSight, which detected the quakes, see the recent hour-long YouTube press conference by NASA, at this link.)
Btw, note from the Mars link (above) that the Red Planet will be at its best for observing this year by December 22.
From Mars to meteors, we noted the prospect of a potential "meteor storm" perhaps to start by late evening on Monday, May 30, or by early morning (from midnight till dawn) on May 31st.
This meteor shower, the Tau Herculids (named for the apparent point in the constellation Hercules, out of which meteors may seem to radiate), may be intense, hence the inclination to call it a meteor storm.
But if indeed those meteors are intense, it would be a fitting shower of tribute to silent keys, to be honored in a memorial net by Don KA9QJG, on the evening of Monday, May 30.
Several hams brought up unusual phenomena, which the Astro Net will likely want to explore in later installments; namely: aurora radio propagation, on which Jim W9JOM described his experience at making a contact using this technique; ball lightning and St. Elmo's Fire, both of which Al KK9F relayed to us; and, meteor scatter, about which Don KA9QJG had a story of its actual practice by a fellow ham.
In addition to a reminder to have some decent optical aid for night-sky viewing, an Astro Net would not be complete without a mention of the Space Weather Woman (aka Dr. Tamitha Skov), who's also an amateur radio operator (WX6SWW).
Thanks to all for checking in!
Next Astro Net to be held on Wednesday, June 8, at 7:00 p. m. Tune in and key up. In the meantime, keep watching the skies.
Astro Net recap, for May 11, 2022
Highlights from on-the-air ham radio transmission on 147.045 MHz
(This is the 2nd installment of the Astro Net.)
On last night's Astro Net (on May 11), Greg KD9HOK brought up an item from his own personal experience. That is, he told his fellow hams about a telescope (maybe a Tasco or a Meade) that his Dad owned and had used a half-century ago. Sounds like some neat, vintage equipment that was popular at the time.
And it sounds to me like a great chance to include a few links here about how one might re-do an old 'scope that hasn't seen much use lately. If it's a vintage Tasco, it might be one of these models as found on this eBay page (gotta look around for at least one), but I don't know for sure.
From Greg's description, the 'scope may be a 4.25-inch reflecting telescope with a mirror at the bottom of the 'scope's tube. If so, here's a link that offers some dated (and opinionated) info on past Tasco products. Don't know if that link will help, but Tasco had an up-and-down reputation for relative optical quality in the 1960's.
Not having seen this scope in person or in a picture, if it's a refracting Tasco telescope (with a big lens at the tube's front), that (at least to me) might be a bit unusual; such a big lens 'scope might've been made and sold, but it just seems rare to find one. My guess is that it's got a mirror in it; and, again, if so, the mirror may need some cleaning, which can be done (at this link or at this link).
Of course, once the mirror has been removed for cleaning, it needs to be put back in the tube and aligned. That alignment is called collimation. Does the telescope need to be aligned? Likely it does, but here (at this link) is how to know.
Once you know the 'scope needs to be collimated (i.e., aligned for good viewing), then here's how it's done. It may seem involved (and it can be), but it can get the scope back in good working order without spending hard-earned dough. Hope this helps.
On last night's Astro Net (on May 11), Greg KD9HOK brought up an item from his own personal experience. That is, he told his fellow hams about a telescope (maybe a Tasco or a Meade) that his Dad owned and had used a half-century ago. Sounds like some neat, vintage equipment that was popular at the time.
And it sounds to me like a great chance to include a few links here about how one might re-do an old 'scope that hasn't seen much use lately. If it's a vintage Tasco, it might be one of these models as found on this eBay page (gotta look around for at least one), but I don't know for sure.
From Greg's description, the 'scope may be a 4.25-inch reflecting telescope with a mirror at the bottom of the 'scope's tube. If so, here's a link that offers some dated (and opinionated) info on past Tasco products. Don't know if that link will help, but Tasco had an up-and-down reputation for relative optical quality in the 1960's.
Not having seen this scope in person or in a picture, if it's a refracting Tasco telescope (with a big lens at the tube's front), that (at least to me) might be a bit unusual; such a big lens 'scope might've been made and sold, but it just seems rare to find one. My guess is that it's got a mirror in it; and, again, if so, the mirror may need some cleaning, which can be done (at this link or at this link).
Of course, once the mirror has been removed for cleaning, it needs to be put back in the tube and aligned. That alignment is called collimation. Does the telescope need to be aligned? Likely it does, but here (at this link) is how to know.
Once you know the 'scope needs to be collimated (i.e., aligned for good viewing), then here's how it's done. It may seem involved (and it can be), but it can get the scope back in good working order without spending hard-earned dough. Hope this helps.
Astro Net recap, for May 4, 2022
Highlights from on-the-air ham radio transmission on 147.045 MHz
(This is the 1st installment of the Astro Net.)
Thank you for the support and participation during the "maiden flight" of the Astro Net. The suborbital dry-run last week (on May 4) appeared to go off without a hitch. Nothing blew up on the launch pad, there were no rocket bodies tumbling back to Earth, and no space capsule sank at sea. What made it work was for you to tune in and key up. Again, many thanks for that. Let's hope all missions to explore the sky go as well.
We're "Go" for launch on Wednesdays at 7 p.m., during the 2nd and 4th weeks of each month. We'll blast off again this coming Wednesday, 5/11.
Last week, we had a variety of topics but focused first on the Sun; this week we'll highlight the Moon. There's a lunar eclipse this month, starting on 5/15; weather permitting, it'll be visible for hours, starting just after 8 p. m. local time, and peaking at mid-eclipse around 11 p. m. Check this link for other details.
We expect to offer some tips on observing, and, hope that you look to try and take pictures of the event. With a steady binocular or a small telescope on a tripod, you can snap photos with your cell phone by just holding the phone's camera to the eyepiece of your optical aid. The phone's own built-in editing features can clean up the brightness of the image and bring out detail. Holding the phone steady or affixing it to the eyepiece will improve focus. (There are tips here on how to do that and adapters to assist, here and here.)
Shown (below) is a typical image of the Quarter Moon. I shot this last night (after the Blistered Pinky Net) through a telescope (and through thin clouds), with a hand-held phone next to the eyepiece. Perhaps the focus could've been better by linking the phone to the 'scope rather than holding it, but it's clear one can get reasonably good shots simply and easily.
Thank you for the support and participation during the "maiden flight" of the Astro Net. The suborbital dry-run last week (on May 4) appeared to go off without a hitch. Nothing blew up on the launch pad, there were no rocket bodies tumbling back to Earth, and no space capsule sank at sea. What made it work was for you to tune in and key up. Again, many thanks for that. Let's hope all missions to explore the sky go as well.
We're "Go" for launch on Wednesdays at 7 p.m., during the 2nd and 4th weeks of each month. We'll blast off again this coming Wednesday, 5/11.
Last week, we had a variety of topics but focused first on the Sun; this week we'll highlight the Moon. There's a lunar eclipse this month, starting on 5/15; weather permitting, it'll be visible for hours, starting just after 8 p. m. local time, and peaking at mid-eclipse around 11 p. m. Check this link for other details.
We expect to offer some tips on observing, and, hope that you look to try and take pictures of the event. With a steady binocular or a small telescope on a tripod, you can snap photos with your cell phone by just holding the phone's camera to the eyepiece of your optical aid. The phone's own built-in editing features can clean up the brightness of the image and bring out detail. Holding the phone steady or affixing it to the eyepiece will improve focus. (There are tips here on how to do that and adapters to assist, here and here.)
Shown (below) is a typical image of the Quarter Moon. I shot this last night (after the Blistered Pinky Net) through a telescope (and through thin clouds), with a hand-held phone next to the eyepiece. Perhaps the focus could've been better by linking the phone to the 'scope rather than holding it, but it's clear one can get reasonably good shots simply and easily.
Astro Net promo
On-the-air ham radio transmission on 147.045 MHz
QST QST QST
"Red sky morning, sailors' warning; red sky night, sailors' delight."
That's an old saying, but the reason it's often true is due to the sky as seen from our Earth. There are many more things in the sky, daytime and nighttime, as seen from Earth, that we may want to know why they're true or what they are.
Who doesn't often look up and wonder about the Moon and stars?
Who looks up and sees a bright star and wonder why it shines so brightly?
Or why that star may actually be a nearby planet?
Why does the Full Moon look big and orange, just above the trees in Autumn; but small and white, high in the sky in Winter?
How does the Sun work, and, how does its radiation affect radio propagation across the world?
To help to answer those questions, the KA9QJG repeater is hosting for amateur radio operators a new radio network, the Astro Net, which is held on Wednesday evenings at 7 p. m. during the second and fourth weeks of every month.
During this net, we'll seek to find those answers, alert the listening audience to special events in the sky, and encourage discussion of ways to view the sky better with telescopes, binoculars, or eyes alone.
Whether you like the Sun or Moon, planets or meteors, or stars and galaxies, or even the occasional satellite across the sky, two of the area's hams, Roy KD9RSE and Glenn KD9PNY, will seek to explore them.
Both of them will serve up topics of interest, discuss current events, and answer questions about the night sky and astronomical phenomena. And we'll swap observations of what we can see in the sky, whether with telescope, with binocular, or with the naked eye.
Tune in to the KA9QJG repeater on Wednesday, at 7:00 p.m., during the second and fourth weeks of every month, for the Astro Net.
This message was approved by Don K A 9 Q J G
And by the way, any Extraterrestrials or Area Fifty-One Space Aliens or any space cadets must have a valid FCC amateur radio license. The knowledge learned on this net may give E T a way to use ham radio to call home.
Stay safe and healthy. Seventy-three.
"Red sky morning, sailors' warning; red sky night, sailors' delight."
That's an old saying, but the reason it's often true is due to the sky as seen from our Earth. There are many more things in the sky, daytime and nighttime, as seen from Earth, that we may want to know why they're true or what they are.
Who doesn't often look up and wonder about the Moon and stars?
Who looks up and sees a bright star and wonder why it shines so brightly?
Or why that star may actually be a nearby planet?
Why does the Full Moon look big and orange, just above the trees in Autumn; but small and white, high in the sky in Winter?
How does the Sun work, and, how does its radiation affect radio propagation across the world?
To help to answer those questions, the KA9QJG repeater is hosting for amateur radio operators a new radio network, the Astro Net, which is held on Wednesday evenings at 7 p. m. during the second and fourth weeks of every month.
During this net, we'll seek to find those answers, alert the listening audience to special events in the sky, and encourage discussion of ways to view the sky better with telescopes, binoculars, or eyes alone.
Whether you like the Sun or Moon, planets or meteors, or stars and galaxies, or even the occasional satellite across the sky, two of the area's hams, Roy KD9RSE and Glenn KD9PNY, will seek to explore them.
Both of them will serve up topics of interest, discuss current events, and answer questions about the night sky and astronomical phenomena. And we'll swap observations of what we can see in the sky, whether with telescope, with binocular, or with the naked eye.
Tune in to the KA9QJG repeater on Wednesday, at 7:00 p.m., during the second and fourth weeks of every month, for the Astro Net.
This message was approved by Don K A 9 Q J G
And by the way, any Extraterrestrials or Area Fifty-One Space Aliens or any space cadets must have a valid FCC amateur radio license. The knowledge learned on this net may give E T a way to use ham radio to call home.
Stay safe and healthy. Seventy-three.
Thank you for visiting. I have prepared this web page for fellow hams to learn more about astronomical topics, such as the Sun and the Moon, stars and galaxies, and other astronomical phenomena of interest. I hope you'll want to learn more, too, and visit here often.
As the pursuit of amateur astronomy is one of my favorite pastimes, it makes sense to pair it the pursuit of amateur radio. That is, while my favorite part of amateur astronomy lets me focus on the visible-light band of the electromagnetic spectrum, amateur radio lets me tune in unseen wavelengths of the same spectrum!
As you may have already surmised, this web page is part of the home website of science teacher, astronomy enthusiast, ham radio hobbyist, and pencil artist, Roy Kaelin. Please take time to look around, and, to explore the other pages here that highlight my interests in astronomy and other natural sciences.
Not only teaching and stargazing, but drawing holds my interest as well. Please visit the companion site, here, at artwork.roykaelin.com for my portraits in pencil and my digital imagery, hosted by Fine Art America.
As the pursuit of amateur astronomy is one of my favorite pastimes, it makes sense to pair it the pursuit of amateur radio. That is, while my favorite part of amateur astronomy lets me focus on the visible-light band of the electromagnetic spectrum, amateur radio lets me tune in unseen wavelengths of the same spectrum!
As you may have already surmised, this web page is part of the home website of science teacher, astronomy enthusiast, ham radio hobbyist, and pencil artist, Roy Kaelin. Please take time to look around, and, to explore the other pages here that highlight my interests in astronomy and other natural sciences.
Not only teaching and stargazing, but drawing holds my interest as well. Please visit the companion site, here, at artwork.roykaelin.com for my portraits in pencil and my digital imagery, hosted by Fine Art America.
In addition to drawing and digital photography, I have an interest in writing. You can explore another companion website here, at books.roykaelin.com to read summaries on a couple of my books: one of science fiction, and, another on an innovative telescope design. Both books you can purchase there.
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