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Old 06-21-2013, 03:34 AM
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Mari Mari is offline
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Join Date: Sep 2006
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Mari Mari is offline
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Join Date: Sep 2006
Posts: 18,914
15 yr Member
Default Way cool!

Quote:
Originally Posted by Brokenfriend View Post
or.

2013 June 19:Milky Way Over Crater Lake with Airglow

It's almost like looking at the stars. BF
Hi, Steve,

Here is the link. The picture is beautiful.
http://apod.nasa.gov/apod/ap130619.html


Quote:
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 about two weeks ago in Oregon, USA.


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bizi (06-22-2013), Brokenfriend (06-21-2013), ginnie (06-21-2013), waves (06-21-2013)