Sunday, August 5, 2007

Amazing rare "rainbow cloud"

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Is it a rainbow that's been set on fire??? Certainly not. The rare "colorful cloud" known as circumhorizontal arc. This rare sight was caught on film on June 3 as it hung over northern Idaho near the Washington State border.

The rare "colorful clouds" forms when light enters through a vertical side face of hexagonal ice crystals that make up cirrus clouds and leaves from the bottom face, it refracts, in the same way that light passes through a prism.

Recently, the rare "colorful cloud" was spotted in skies above the Hami City, Xinjiang.

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