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Astronomy Picture of the Day -- Austrian Analemma
NASA ^ | September 22, 2012 | (see photo credit)

Posted on 09/22/2012 8:57:01 PM PDT by SunkenCiv

Explanation: Today, the Sun crosses the celestial equator heading south at 14:49 Universal Time. An equinox (equal night), this astronomical event marks the first day of autumn in the northern hemisphere and spring in the south. With the Sun on the celestial equator, Earth dwellers will experience nearly 12 hours of daylight and 12 hours of darkness. To celebrate, consider this careful record of the Sun's yearly journey through southern Austrian skies. The scene is composed of images made at the same time each day, capturing the Sun's position on dates from September 29, 2011 through September 9, 2012. The multiple suns trace an intersecting curve known as an analemma. In fact, the past year's two equinox dates correspond to the middle (not the intersection point) of the curve. The summer and winter solstices are at the top and bottom. Of course, many would also consider it a good idea to travel the mountain road toward the left, passing the vineyards along the way to reach the nearby town of Kitzeck and toast the equinox with a glass of wine. Near the roadside bench is a windmill-like klapotetz, traditionally used in this wine-growing region to keep the birds away.

September 22, 2012

(Excerpt) Read more at 129.164.179.22 ...


TOPICS: Astronomy; Astronomy Picture of the Day; Science
KEYWORDS: analemma; apod; astronomy; science
[Credit & Copyright: Robert Pölzl]

1 posted on 09/22/2012 8:57:06 PM PDT by SunkenCiv
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To: brytlea; cripplecreek; decimon; bigheadfred; KoRn; Grammy; married21; steelyourfaith; Mmogamer; ...

2 posted on 09/22/2012 8:58:09 PM PDT by SunkenCiv (https://secure.freerepublic.com/donate/)
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To: SunkenCiv

cool image


3 posted on 09/22/2012 9:01:48 PM PDT by GeronL (The Right to Life came before the Right to Pursue Happiness)
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To: SunkenCiv

That sounds vaguely obscene........


4 posted on 09/22/2012 9:06:32 PM PDT by Red Badger (Anyone who thinks wisdom comes with age is either too young or too stupid to know the difference....)
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To: Red Badger

In Europe they have to be licensed, inspected, and taxed.


5 posted on 09/22/2012 9:20:06 PM PDT by SunkenCiv (https://secure.freerepublic.com/donate/)
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To: SunkenCiv

Pretty. Thank you!


6 posted on 09/22/2012 9:33:08 PM PDT by Robert A. Cook, PE (I can only donate monthly, but socialists' ABBCNNBCBS continue to lie every day!)
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To: SunkenCiv

Cool. I would expect much more east/west variation. I can’t explain the absence. In Az the winter sun sets in the front yard while summer sun sets deep in the back yard. Wide angle view nor distance from equator (less than Austria) seems to be the answer but.....I know nothing


7 posted on 09/22/2012 10:02:44 PM PDT by chiller (First check the poll's Dem/Rep/Ind sampling numbers, then re-think.)
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To: chiller

We may be in for some more analemma (the term is new to me, although I’d seen such photos before) in the near future, should be interesting.


8 posted on 09/22/2012 10:54:05 PM PDT by SunkenCiv (https://secure.freerepublic.com/donate/)
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To: SunkenCiv
Near the roadside bench is a windmill-like klapotetz, traditionally used in this wine-growing region to keep the birds away.

Hmmm. In the U.S. we use windmills to KILL birds...

9 posted on 09/23/2012 2:10:55 AM PDT by BigBobber
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To: chiller

If the pics were at sunrise/set you would have seen the shift depending on your distance from equator. Pics used optimum same time of day to show figure eight.


10 posted on 09/23/2012 3:28:26 AM PDT by jonose
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To: jonose

Thanks....that’s it.


11 posted on 09/23/2012 5:50:14 AM PDT by chiller (First check the poll's Dem/Rep/Ind sampling numbers, then re-think.)
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To: SunkenCiv
In Europe they have to be licensed, inspected, and taxed.

What, analemmata?

12 posted on 09/23/2012 1:39:34 PM PDT by Verginius Rufus
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