Tuesday, August 28, 2012

Weird Cloud Atlas: a collection of spectacular cloud formations (the Telegraph, 8/28/12)


Noctilucent clouds are crystals of ice hanging around 80 kilometres high in the atmosphere that catch the light of the sun long after it has set on the horizon. Natural nacreous clouds occur at altitudes of 20-25 kilometres. The cloud in this image was formed from the exhaust of a missile launched from a distant firing range.
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