images

Sun Halo-captionned image

by

Sauli Koski/Novapix

Reference

t-met03-00035

Date

2012-03-10

Halos are caused by sunlight being refracted by cirro-stratus clouds. These are thin clouds, very high in the atmosphere, and are composed of ice crystals. They bend light at a 22 degree angle, which creates a halo around the sun that is 44 degrees in diameter. Finland, october 30, 2010.