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Old 11-29-2001, 12:03 PM   #1
Undertoad
Radical Centrist
 
Join Date: Jan 2001
Location: Cottage of Prussia
Posts: 31,423
11/29: Upper Tangent Arc



This is another solar phenomenon that is not aliens. It's called an "upper tangent arc". It happens when "cirrus clouds contain columnar ice crystals aligned so that their axes are all in a horizontal direction". Got it.

This is always about 22 degrees away from the Sun itself. This particular image also has a bit of "sun pillar" which was an iotd a few days ago.
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