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Can you tell me why a double... | Almanac.com

Can you tell me why a double...

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Can you tell me why a double rainbow sometimes appears around the Sun?
The phenomenon you are describing is called a sun dog, which is caused by frozen water vapor in the upper atmosphere. The brighter the ring, the greater the chances of rain. A reddish ring around the Sun, usually caused by dust particles in the air after a volcanic eruption, is called a bishop’s ring.

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