Noctilucent Cloud

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Uploaded by on Jul 24, 2009

Noctilucent Cloud movement over 2minutes at high magnification 300mm
Noctilucent clouds are composed of tiny crystals of water ice 40 to 100 nanometers in diameter and exist at a height of about 76 to 85 kilometers (47 to 53 miles), higher than any other clouds in Earth's atmosphere.

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Science & Technology

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