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Old 02-08-2010, 05:47 PM   #1
Seashore
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Join Date: Nov 2008
Posts: 3,564
Default "A Sun Halo Over Cambodia"

Here is the explanation for this Astronomy Picture of the Day for February 8, 2010:

Quote:
Explanation: Have you ever seen a halo around the Sun? This fairly common sight occurs when high thin clouds containing millions of tiny ice crystals cover much of the sky. Each ice crystal acts like a miniature lens. Because most of the crystals have a similar elongated hexagonal shape, light entering one crystal face and exiting through the opposing face refracts 22 degrees, which corresponds to the radius of the Sun halo. A similar Moon halo may be visible during the night. Pictured above, a nearly complete sun halo was photographed high above the ancient Bayon temple in Angkor, Cambodia. Exactly how ice-crystals form in clouds remains under investigation.
I think this is cool looking :



Credit & Copyright: Nagy Attila

Here's the link: http://antwrp.gsfc.nasa.gov/apod/astropix.html
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