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Astronomy Picture of the Day - Sun Halo over Sweden
APOD.NASA.gov ^ | 28 Dec, 2021 | Video Credit & Copyright: HΓ₯kan Hammar (Vemdalen Ski Resort, SkiStar)

Posted on 12/28/2021 3:36:49 PM PST by MtnClimber

Explanation: What's happened to the Sun? Sometimes it looks like the Sun is being viewed through a giant lens. In the featured video, however, there are actually millions of tiny lenses: ice crystals. Water may freeze in the atmosphere into small, flat, six-sided, ice crystals. As these crystals flutter to the ground, much time is spent with their faces flat and parallel to the ground. An observer may find themselves in the same plane as many of the falling ice crystals near sunrise or sunset. During this alignment, each crystal can act like a miniature lens, refracting sunlight into our view and creating phenomena like parhelia, the technical term for sundogs. The featured video was taken in late 2017 on the side of a ski hill at the Vemdalen Ski Resort in central Sweden. Visible in the center is the most direct image of the Sun, while two bright sundogs glow prominently from both the left and the right. Also visible is the bright 22 degree halo -- as well as the rarer and much fainter 46 degree halo -- also created by sunlight refracting through atmospheric ice crystals.


TOPICS: Astronomy; Astronomy Picture of the Day; Science
KEYWORDS: nasa
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Today's image is a video at the source link.

1 posted on 12/28/2021 3:36:49 PM PST by MtnClimber
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To: 21stCenturion; 21twelve; 4everontheRight; abb; AFB-XYZ; America_Right; AZ .44 MAG; BBB333; ...
Pinging the APOD list.

πŸͺ 🌟 🌌 πŸ”

Today's image is a video at the source link.
2 posted on 12/28/2021 3:37:58 PM PST by MtnClimber (For photos of Colorado scenery and wildlife, click on my screen name for my FR home page.)
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To: MtnClimber
In Hoc Signo Vinces.

Perhaps Constantine the Great saw something similar in 312 AD.

3 posted on 12/28/2021 5:44:56 PM PST by rfp1234 (Comitia asinorum et rhinocerum delenda sunt.)
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To: MtnClimber

We saw views of the sun like this in northern Minnesota. The side images were called “Sun Dogs”. It happened on cold still mornings just after sunrise.


4 posted on 12/28/2021 6:49:59 PM PST by norwaypinesavage (Capitalism is what happens when you leave people alone.)
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To: MtnClimber

Now that is the best “observation” I’ve observed in a while!


5 posted on 12/29/2021 6:24:13 AM PST by gloryblaze
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