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What is a "Halo"?

Published On: Jul 28 2011 10:28:08 AM CDT

Have you ever seen a single ring of color around the sun or moon?

It is called a halo, and it occurs more frequently in nature than a rainbow.

When the sky is draped in a high, thin overcast of cirrus clouds.

The six-sided ice crystals that make up those clouds act as the prisms that separate the sun's light into colors.

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