Our Solar System - Robert Arn
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Ring in the Sky

On a night when there is a layer of thin clouds in the upper atmosphere and the moon is full, you can sometimes see a Lunar Halo - a 22 degree circle around the moon which is caused by moonlight reflecting off of ice crystals in the upper atmosphere.

Location: Arches National Park, UT
Date: 2011-03-13
Camera: Canon XSi (modified)
Lens: Sigma 10mm f/1.8 Fisheye
Shot: Single Shot
1x30 seconds f/3.5 ISO 800
Processing: Photoshop, Topaz