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<div dir="ltr" data-setdir="false">Fascinating information, Austin, even though it's over my head!</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">Bob, W7SCY</div><div><br></div>
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On Thursday, August 12, 2021, 06:06:06 AM PDT, Austin Smith <asmith73@hotmail.com> wrote:
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I don't know how broad banded the signal would be. Following is a heavily edited quotation from the Encyclopedia Britannica. For the full description, search for "21-centimetre radiation" or "cold hydrogen frequency".</div>
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21-centimetre radiation, electromagnetic radiation of radio wavelength emitted by cold, neutral, interstellar hydrogen atoms. According to the rules of quantum mechanics, such atoms radiate their acquired energy in the form of low-energy photons that correspond
to a wavelength of 21 centimetres, or a frequency of 1,420 megahertz. This transition, called a hyperfine transition, occurs roughly every 10 million years. Although the transition occurs very rarely, there is so much hydrogen in the Milky Way Galaxy that
21-centimetre hydrogen emission is easily observable. The 21-centimetre radiation readily penetrates the clouds of interstellar dust particles that obstruct optical observations deep into the galactic centre and thus allows the mapping of the galaxy’s spiral
structure.</div>
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73,</div>
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ASm<br clear="none">
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WA5CAW<br clear="none">
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<div class="yiv5860204296yqt1487798591" id="yiv5860204296yqt17769"><div dir="ltr" id="yiv5860204296divRplyFwdMsg"><font style="font-size:11pt;" face="Calibri, sans-serif" color="#000000"><b>From:</b> HiDARG-Members <hidarg-members-bounces@hidarg.org> on behalf of Randy Tomer <w6ra.randy@gmail.com><br clear="none">
<b>Sent:</b> Wednesday, August 11, 2021 9:56 PM<br clear="none">
<b>To:</b> HiDARG Members <hidarg-members@hidarg.org><br clear="none">
<b>Subject:</b> Re: [HiDARG-MEMBERS] Nova</font>
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<div dir="ltr">Would 1296 work?
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<div>Randy</div>
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<div class="yiv5860204296x_gmail_attr" dir="ltr">On Wed, Aug 11, 2021 at 4:38 PM Austin Smith <<a shape="rect" ymailto="mailto:asmith73@hotmail.com" href="mailto:asmith73@hotmail.com" target="_blank" rel="noreferrer noopener">asmith73@hotmail.com</a>> wrote:<br clear="none">
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You will need to listen on 1,420 MHz (21 cm).</div>
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73,</div>
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ASm</div>
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WA5CAW<br clear="none">
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<div dir="ltr" id="yiv5860204296x_gmail-m_-3498634626250508169divRplyFwdMsg"><font style="font-size:11pt;" face="Calibri, sans-serif" color="#000000"><b>From:</b> HiDARG-Members <<a shape="rect" ymailto="mailto:hidarg-members-bounces@hidarg.org" href="mailto:hidarg-members-bounces@hidarg.org" target="_blank" rel="noreferrer noopener">hidarg-members-bounces@hidarg.org</a>>
on behalf of Randy Tomer <<a shape="rect" ymailto="mailto:w6ra.randy@gmail.com" href="mailto:w6ra.randy@gmail.com" target="_blank" rel="noreferrer noopener">w6ra.randy@gmail.com</a>><br clear="none">
<b>Sent:</b> Wednesday, August 11, 2021 11:53 AM<br clear="none">
<b>To:</b> HiDARG Members <<a shape="rect" ymailto="mailto:hidarg-members@hidarg.org" href="mailto:hidarg-members@hidarg.org" target="_blank" rel="noreferrer noopener">hidarg-members@hidarg.org</a>><br clear="none">
<b>Subject:</b> Re: [HiDARG-MEMBERS] Nova</font>
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<div dir="ltr">Can we bounce VHF signals off of it?
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<div>73</div>
<div>Randy</div>
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<div dir="ltr">On Mon, Aug 9, 2021 at 4:02 PM John Britt Baldwin <<a shape="rect" ymailto="mailto:johnbritt.baldwin@gmail.com" href="mailto:johnbritt.baldwin@gmail.com" target="_blank" rel="noreferrer noopener">johnbritt.baldwin@gmail.com</a>> wrote:<br clear="none">
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<strong><span style="font-size:18px;">Space Weather News for Aug. 9, 2021</span></strong><br clear="none">
<a shape="rect" href="https://spaceweather.us11.list-manage.com/track/click?u=0c5fce34d5ca05f64a13d085d&id=7d5dd834c9&e=716ff4edb0" style="color:rgb(0,124,137);" target="_blank" rel="noreferrer noopener">https://spaceweather.com</a><br clear="none">
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<strong>RARE NAKED-EYE NOVA:</strong> Yesterday, a star in the constellation Ophiuchus exploded. Although it is 5000 light years away, the blast is bright enough to see with the unaided eye after sunset. Get the full story with observing tips at @ <a shape="rect" href="https://spaceweather.us11.list-manage.com/track/click?u=0c5fce34d5ca05f64a13d085d&id=a395ebee09&e=716ff4edb0" style="color:rgb(0,124,137);" target="_blank" rel="noreferrer noopener">Spaceweather.com</a>.<br clear="none">
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<strong>Aurora Alerts:</strong> Sign up for <a shape="rect" href="https://spaceweather.us11.list-manage.com/track/click?u=0c5fce34d5ca05f64a13d085d&id=6f8f0e5f8a&e=716ff4edb0" style="color:rgb(0,124,137);" target="_blank" rel="noreferrer noopener">Space Weather Alerts</a> and get instant professional
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<div style="text-align:center;"><strong>Above:</strong> Exploding star RS Oph photographed during the early hours of Aug. 9th by Ernesto Guido, Marco Rocchetto & Adriano Valvasori. At the time, the nova's visual magnitude was +5 and it has continued to brighten
since then.</div>
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