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This "halo" is called a Sun Dog. It is caused as sunlight passes through ice crystals falling through the sky. Sunlight hits the ice crystals and it spreads out, much like what causes a rainbow when it rains. Summit Camp, Greenland.

Credit to read: Photo by Craig Beals (PolarTREC 2008), Courtesy of ARCUS

Photographer: Craig Beals
Category: 
Year: 
2008
Program: 
PolarTREC
Region: 
Greenland
Topic: 
File Information
Focal Length: 
7.7mm
File Size: 
2378482
Computed Mime: 
image/jpeg
Max Aperture: 
f/7.1
Height: 
2304
Width: 
3072
Make: 
Canon
Model: 
Canon PowerShot SD550
Exposure Time: 
1/1250s

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