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Astronomy Picture of the Day - Three Sky Arches over Snowy Alps
NASA ^ | 21 Apr, 2026 | Image Credit & Copyright: Angel Fux

Posted on 04/21/2026 12:25:46 PM PDT by MtnClimber

Explanation: Why are there three arches across the sky instead of two? Last month, after being dropped off by a helicopter at a high mountain peak in the Alps near the Swiss Italian border, an adventurous astrophotographer expected two arches of our Milky Way galaxy to be visible during the night. These were the inner arch looking in toward the center of our galaxy on the left, visible just before sunrise, and the outer arch on the right visible just after sunset. But there were three arches. The surprised astrophotographer soon realized that the sky was so dark that an entire arc of faint zodiacal light was also noticeable -- sunlight scattered by inner Solar System dust. And it artfully connected the two Milky Way arches! The next morning a helicopter picked the astrophotographer back up, and after 40 hours of processing and combining that night's images, the featured triple-arch 360-degree panorama resulted.


TOPICS: Astronomy; Science
KEYWORDS: apod; nasa

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1 posted on 04/21/2026 12:25:46 PM PDT by MtnClimber
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To: MtnClimber

2 posted on 04/21/2026 12:26:31 PM PDT by MtnClimber (For photos of scenery, wildlife and climbing, click on my screen name for my FR home page.)
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To: MtnClimber

3 posted on 04/21/2026 12:26:55 PM PDT by MtnClimber (For photos of scenery, wildlife and climbing, click on my screen name for my FR home page.)
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To: 21stCenturion; 21twelve; 4everontheRight; A Navy Vet; A_perfect_lady; abb; AFB-XYZ; AFPhys; ...
Pinging the APOD list

๐Ÿช ๐ŸŒŸ ๐ŸŒŒ ๐Ÿ”

4 posted on 04/21/2026 12:27:35 PM PDT by MtnClimber (For photos of scenery, wildlife and climbing, click on my screen name for my FR home page.)
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I have done some climbing in this region. The Matterhorn (Switzerland) which is shown in this image. Also Aguille du Midi (France), Mt Blanc du Tacul (France) and Eiger (Switzerland). A really beautiful area.


5 posted on 04/21/2026 12:31:02 PM PDT by MtnClimber (For photos of scenery, wildlife and climbing, click on my screen name for my FR home page.)
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To: MtnClimber

Wow.


6 posted on 04/21/2026 12:34:26 PM PDT by No name given ( Anonymous is who youโ€™ll know me as )
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To: MtnClimber

Wow!


7 posted on 04/21/2026 12:35:24 PM PDT by Vaquero (Don't pick a fight with an old guy. If he is too old to fight, he'll just kill you. )
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To: MtnClimber

Cool!

Thanks!


8 posted on 04/21/2026 12:36:54 PM PDT by blueunicorn6 ("A crack shot and a good dancerโ€ )
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To: MtnClimber

On May 19, 1985 I was hiking with friends in the southern Appalachians. We arrived late, so didn’t get much hiking done before it started getting dark and we pitched camp. It was an absolutely dark, cold night (new moon) and the Milky Way blazed in its full glory as I had never seen it before or after.


9 posted on 04/21/2026 12:46:13 PM PDT by pierrem15 ("Massacrez-les, car le seigneur connait les siens" )
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