Once again Nature amazes me.
“The arc isn’t a rainbow in the traditional sense it is caused by light passing through wispy, high-altitude cirrus clouds. The sight occurs only when the sun is very high in the sky (more than 58° above the horizon). The hexagonal ice crystals that make up cirrus clouds must be shaped like thick plates with their faces parallel to the ground.”
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on Tuesday, June 20th, 2006 at 11:21 am and is filed under Noteworthy.
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