Posted by: bkivey | 31 October 2012

A Really Cool Sky

I’m a bit of a sky junkie: weather by day and astronomical phenomenon (when they can be seen here) by night. This image was taken in Huntsville, AL on the afternoon of 30 October:

Visible are two sun dogs (left and right of the Sun), 22 degree halo (around the Sun),   parahelic circle (upper arc around Sun),  upper tangent arc (at the top of the halo), and a parry arc (the upside down rainbow).  These structures are caused by sunlight shining through high-altitude ice crystals. While some of these phenomenon are not uncommon (the sun dogs and halo), it’s very rare to see all of them at the same time.


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