An Upside-down Rainbow?



Upside-down Rainbow

What looks like an upside-down rainbow is actually a rare atmospheric spectacle called a circumzenithal arc. According to the San Francisco Chronicle: “it’s an unusual phenomenon caused by sunlight shining through a thin, invisible screen of tiny ice crystals high in the sky and has nothing at all to do with the rain.”

Feel free to be scientifically correct, but I’ll stick with calling it an “upside-down rainbow” … “circumzenithal arc” just doesn’t have the same pizzazz. Link via popurls.


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Posted on February 24, 2007 at 3:55 am by Anita
Category: Pictures, Science & Tech



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