images

Lunar Halo

by

Sauli Koski/Novapix

Reference

t-met03-80014

Date

2012-03-11

Lunar halos are caused by moonlight being refracted by cirro-stratus clouds. These thin clouds are located very high in the atmosphere, and are composed of ice crystals. They bend light at a 22 degree angle, which creates a halo that is 44 degrees in diameter. Bright dot under the Moon is planet Jupiter. November 10 2011.