Night clouds or noctilucent clouds are tenuous cloud-like phenomena that are the “ragged edge” of a much brighter and pervasive polar cloud layer called polar mesospheric clouds in the upper atmosphere, visible in a deep twilight. They are made of crystals of water ice. Noctilucent roughly means night shining in Latin. They are most commonly […]
Archives: July 23, 2014
Work on ISS. Glass Windows Inspection and Photography. MIM2 Module (photo)
July 23, 2014 Oleg Artemyev
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