It’s a Halo, not a Rainbow, Around the Sun!

If you ever see a ring around the sun or moon that looks like a rainbow, it's not! A rainbow only happens when it's raining in the direction of your shadow, with the sun on the other side of you. What you see around the sun or moon is a halo. It's a cousin of a rainbow, caused by refraction and reflection and it could be seen anywhere on Earth, any time of the year, as long as you have a veil of cirrus clouds.
Meteorologist Alan Sealls
Facebook: Alan Sealls Weather
Twitter: @AlanSealls
Web: alansealls.com
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