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Astronomy Picture of the Day -- Milky Way Over Crater Lake with Airglow
NASA ^ | June 19, 2013 | (see photo credit)

Posted on 06/18/2013 11:51:06 PM PDT by SunkenCiv

Explanation: How many different astronomical phenomena have come together to create the above vista? Several. First, in the foreground, is Crater Lake -- a caldera created by volcanism on planet Earth about 7,700 years ago. Next, inside the lake, is water. Although the origin of the water in the crater is melted snowfall, the origin of water on Earth more generally is unclear, but possibly related to ancient Earthly-impacts of icy bodies. Next, the green glow in the sky is airglow, light emitted by atoms high in the Earth's atmosphere as they recombine at night after being separated during the day by energetic sunlight. The many points of light in the sky are stars, glowing by nuclear fusion. They are far above the atmosphere but nearby to our Sun in the Milky Way Galaxy. Finally, the bright arch across the image is the central band of the Milky Way, much further away, on the average, than the nearby stars, and shaped mostly by gravity. Contrary to appearances, the Milky Way band glows by itself and is not illuminated by the airglow. The above image is a six-frame panorama taken during about two weeks ago in Oregon, USA.

June 19, 2013

(Excerpt) Read more at 129.164.179.22 ...


TOPICS: Astronomy; Astronomy Picture of the Day; Science
KEYWORDS: apod; astronomy; science
[Credit & Copyright: John H. Moore; Annotation: Judy Schmidt]

1 posted on 06/18/2013 11:51:07 PM PDT by SunkenCiv
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To: brytlea; cripplecreek; decimon; bigheadfred; KoRn; Grammy; married21; steelyourfaith; Mmogamer; ...
The Big One.

2 posted on 06/18/2013 11:51:59 PM PDT by SunkenCiv (McCain or Romney would have been worse, if you're a dumb ass.)
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To: SunkenCiv

That’s one of the prettiest pictures I’ve ever seen.


3 posted on 06/18/2013 11:53:30 PM PDT by EternalVigilance
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To: SunkenCiv

That is an impressive photo.


4 posted on 06/18/2013 11:54:11 PM PDT by SatinDoll (NATURAL BORN CITZEN: BORN IN THE USA OF CITIZEN PARENTS.)
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To: SunkenCiv

Nice desktop!! Gonna have to be uber cool to take this one down.


5 posted on 06/19/2013 12:04:19 AM PDT by rawcatslyentist (Jeremiah 50:32 "The arrogant one will stumble and fall With no one to raise him up; And I will set)
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To: SunkenCiv
Great pic! Here's one I like taken at the Palomar Observatory in San Diego.


6 posted on 06/19/2013 12:17:22 AM PDT by South40
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To: SunkenCiv

This picture is just beyond spectacular!! Thanks, Sunky!!


7 posted on 06/19/2013 7:20:26 AM PDT by momtothree
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To: SunkenCiv

Cool pic!


8 posted on 06/19/2013 9:59:24 AM PDT by editor-surveyor (Freepers: Not as smart as I'd hoped they'd be)
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To: rawcatslyentist; SunkenCiv
Nice desktop!! Gonna have to be uber cool to take this one down.

Same here. My wife saw my desktop and said, "WOW!".

Thanks SunkenCiv.

9 posted on 06/19/2013 10:11:00 AM PDT by houeto (https://secure.freerepublic.com/donate/)
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