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Astronomy Picture of the Day - Driveway Analemma
NASA ^ | 4 Dec, 2024 | Video Credit & Copyright: Nick Wright

Posted on 12/04/2024 12:52:47 PM PST by MtnClimber

Explanation: Does the Sun return to the same spot on the sky every day? No. A more visual answer is an analemma, a composite of sky images taken at the same time and from the same place over a year. At completion, you can see that the Sun makes a figure 8 on the sky. The featured unusual analemma does not, however, picture the Sun directly: it was created by looking in the opposite direction. All that was required was noting where the shadow of an edge of a house was in the driveway every clear day at the same time. Starting in March in Falcon, Colorado, USA, the photographer methodically marked the shadow's 1 pm location. In one frame you can even see the photographer himself. Although this analemma will be completed in 2025, you can start drawing your own driveway analemma -- using no fancy equipment -- as soon as today.


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

Today's imave is a video at the source link

1 posted on 12/04/2024 12:52:47 PM PST by MtnClimber
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To: MtnClimber
Pinging the APOD list

🪐 🌟 🌌 🍔

Today's image is a video at the source link

2 posted on 12/04/2024 12:53:33 PM PST 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

What Anal Emma?....................


3 posted on 12/04/2024 12:57:18 PM PST by Red Badger (Homeless veterans camp in the streets while illegals are put up in 5 Star hotels....................)
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To: MtnClimber
That is really cool!

Honestly, I still don't understand it (how the effect happens).

4 posted on 12/04/2024 1:40:29 PM PST by spankalib
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To: MtnClimber

OK, that’s really cool. I have similar structural geometry at home; I might try it.


5 posted on 12/04/2024 1:46:27 PM PST by NorthMountain (... the right of the people to keep and bear arms shall not be infringed)
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To: spankalib

From a given location on Earth, at a given time of day, the sun does not appear at the same place in the sky each day.

Earth’s axis of rotation is tilted with respect to its orbital plane around the sun. Earth’s orbit is also slightly eccentric. These combine to form the figure-8 pattern of the sun’s position in the sky, or the pattern traced out by the shadow of the roof corner on the driveway.


6 posted on 12/04/2024 1:50:51 PM PST by NorthMountain (... the right of the people to keep and bear arms shall not be infringed)
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To: Red Badger
What Anal Emma?........

No, it's Ana Lemma. One of those 19th-century Russian novels.

7 posted on 12/04/2024 2:03:01 PM PST by Verginius Rufus
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To: NorthMountain

My grandparents had a globe with an analemma on it. But they didn’t have a driveway.


8 posted on 12/04/2024 2:04:51 PM PST by Verginius Rufus
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To: NorthMountain

Great explanation! I would love to try that someday.


9 posted on 12/04/2024 3:18:59 PM PST by telescope115 (I NEED MY SPACE!!! 🔭)
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To: NorthMountain

If I could mount a camera in a location inside where it wouldn’t get bumped….


10 posted on 12/04/2024 3:22:06 PM PST by telescope115 (I NEED MY SPACE!!! 🔭)
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To: telescope115

I’m currently thinking in terms of putting an ESP32 microcontroller with attached camera on the wall, and having it serve up a picture at the same time of day every day to a web app on my main computer.


11 posted on 12/04/2024 3:26:59 PM PST by NorthMountain (... the right of the people to keep and bear arms shall not be infringed)
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To: NorthMountain

Pretty cool idea.


12 posted on 12/04/2024 5:15:41 PM PST by telescope115 (I NEED MY SPACE!!! 🔭)
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To: 21stCenturion; 21twelve; 4everontheRight; A Navy Vet; A_perfect_lady; abb; AFB-XYZ; AFPhys; ...

Pinging the APOD list (with the list this time)
🪐 🌟 🌌 🍔

Today’s image is a video at the source link


13 posted on 12/04/2024 6:01:56 PM PST by MtnClimber (For photos of scenery, wildlife and climbing, click on my screen name for my FR home page.)
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The rest of the Analemma keyword, sorted:

14 posted on 12/06/2024 4:03:19 PM PST by SunkenCiv (Analemma is at least as funny as Uranus.)
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