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Astronomy Picture of the Day -- High Noon Analemma Over Azerbaijan
NASA ^ | October 14, 2013 | (see photo credit)

Posted on 10/13/2013 9:13:25 PM PDT by SunkenCiv

Explanation: Is the Sun always straight up at noontime? No. For example, the Sun never appears directly overhead from locations well north or south of the Earth's equator. Conversely, there is always a place on Earth where the Sun will appear at zenith at noon -- for example on the equator during an equinox. Turning the problem around, however, as in finding where the Sun actually appears to be at high noon, is as easy as waiting for midday, pointing your camera up, and taking a picture. If you do this often enough, you find that as the days march by, the Sun slowly traces out a figure eight on the sky. Pictured above is one such high noon analemma -- a series of pictures always taken at exactly noontime over the course of a year. The above fisheye image, accumulated mostly during 2012, also shows some buildings and trees of Baku, Azerbaijan around the edges.

October 14, 2013

(Excerpt) Read more at asterisk.apod.com ...


TOPICS: Astronomy; Astronomy Picture of the Day; Science
KEYWORDS: analemma; apod; astronomy; azerbaijan; science
[Credit & Copyright: Tunç Tezel (TWAN)]

1 posted on 10/13/2013 9:13:25 PM PDT by SunkenCiv
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To: brytlea; cripplecreek; decimon; bigheadfred; KoRn; Grammy; married21; steelyourfaith; Mmogamer; ...

How to follow APOD if the US government shuts down. · Temporary EZ-post.

I think this APoD is a repeat from a few years ago.
The Big One

2 posted on 10/13/2013 9:14:18 PM PDT by SunkenCiv (It's no coincidence that some "conservatives" echo the hard left.)
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To: SunkenCiv

Simply amazing. Thanks.


3 posted on 10/13/2013 9:15:42 PM PDT by deadrock (I am someone else.)
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To: SunkenCiv
I learned a lot tonight.
Almost made me long for science classes.
Thank you so much, dearest SunkenCiv.
4 posted on 10/13/2013 9:20:39 PM PDT by onyx (Please Support Free Republic - Donate Monthly! If you want on Sarah Palin's Ping List, Let Me know!)
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To: SunkenCiv

An analemma is depicted in the Tom Hanks film, CASTAWAY. He draws one on the wall of a sort of cave, where the sun shadow forms a spot.

This was a counterfactual depiction, as note the statement in the article that the image, or record, in the CASTAWAY case, must be made at NOON, which means clocktime. If you took it at “solar noon” it would just mean marking it in a straight line.


5 posted on 10/13/2013 9:44:03 PM PDT by dr_lew
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To: SunkenCiv

Beautiful!

And I my hobby is rolling and welding “true” armillary spheres, accurate for the location of the sunrise, zenith and sunset for every day of the year for the latitude the sphere is located!


6 posted on 10/13/2013 9:50:40 PM PDT by Robert A. Cook, PE (I can only donate monthly, but socialists' ABBCNNBCBS continue to lie every day!)
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