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Astronomy Picture of the Day - The Solar Eclipse Analemma Project
NASA ^ | 20 Mar, 2025 | Image Credit & Copyright: Hunter Wells

Posted on 03/20/2025 12:26:42 PM PDT by MtnClimber

Explanation: Recorded from 2024 March 10, to 2025 March 1, this composited series of images reveals a pattern in the seasonal drift of the Sun's daily motion through planet Earth's sky. Known to some as an analemma, the figure-eight curve was captured in exposures taken on the indicated dates only at 18:38 UTC from the exact same location south of Stephenville, Texas. The Sun's position on the 2024 solstice dates of June 20 and December 21 would be at the top and bottom of the curve and correspond to the astronomical beginning of summer and winter in the north. Points that lie along the curve half-way between the solstices would mark the equinoxes. The 2024 equinox on September 22, and in 2025 the equinox on March 20 (today) are the start of northern fall and spring. And since one of the exposures was made on 2024 April 8 from the Stephenville location at 18:38:40 UTC, this analemma project also reveals the solar corona in planet Earth's sky during a total solar eclipse.


TOPICS: Astronomy; Astronomy Picture of the Day; Science
KEYWORDS: analemma; apod; nasa
To be added or removed from the Astronomy Picture of the Day ping list please send me a request via "Private Reply" (Mail).

For more detail go to the link and click on the image for a high definition image. You can then move the magnifying glass cursor then click to zoom in and click again to zoom out. When zoomed in you can scan by moving the side bars on the bottom and right side of the image.

1 posted on 03/20/2025 12:26:42 PM PDT by MtnClimber
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To: MtnClimber

2 posted on 03/20/2025 12:27:03 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

🪐 🌟 🌌 🍔

3 posted on 03/20/2025 12:27:54 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

It looks like a pearl necklace.


4 posted on 03/20/2025 12:34:52 PM PDT by No name given ( Anonymous is who you’ll know me as)
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To: MtnClimber

Anal enema? Wow, that sounds brutal.


5 posted on 03/20/2025 12:48:22 PM PDT by Bullish (I've never seen such morons... Have you?)
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To: Bullish

Is this another SNL Jeopardy skit?


6 posted on 03/20/2025 1:10:37 PM PDT by budj (Combat vet, 2nd of 3 generations.)
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To: MtnClimber
The first photo of an analemma I ever saw was on the cover of Sky and Telescope magazine. I don’t remember the year, but it’s been many many analemmas ago….

Very cool every time I see one.

7 posted on 03/20/2025 1:33:49 PM PDT by telescope115 (I NEED MY SPACE!!! 🔭)
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To: Bullish
Anal enema? Wow, that sounds brutal.

Especially if it contains Tabasco.

8 posted on 03/20/2025 2:30:42 PM PDT by AFB-XYZ ( )
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To: telescope115

Yes, telescope guy, it was in the early 70s. I subscribed since early ‘71 but my brother had a mix of earlier issues laying around.

Originally done with film it’s a difficult exposure(s). Bumping the camera, accidental overexposure, could easily ruin one year of images.

A company called Solarscan uses a pinhole camera in an aluminum can body to hold a single positive exposure print. In other words the sun trails appear black on the paper, and a scanner can flip the image. Costs less than $25, from England. I have a 3 month scan that turned out so-so.


9 posted on 03/20/2025 3:15:46 PM PDT by F450-V10
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To: MtnClimber
Analemma... yeah... I think I went to school with Ana...

10 posted on 03/20/2025 3:47:59 PM PDT by SunkenCiv (Putin should skip ahead to where he kills himself in the bunker.)
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To: F450-V10
I haven’t looked at an issue of S&T in years. I used to get Astronomy magazine, too. I’ll have to pick up copies and check them out.
11 posted on 03/21/2025 5:55:45 AM PDT by telescope115 (I NEED MY SPACE!!! 🔭)
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