Category:Noctilucent clouds

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Noctilucent clouds, also known as polar mesospheric clouds, are very high (typically 80 km) cloud-like phenomena in the upper atmosphere, visible in a deep twilight. They are made of crystals of water ice. The name means roughly night shining in Latin. [1]

They are also distinct from Polar stratospheric clouds (also called Nacreous clouds), typically only 20 km high.

Please see Category:Polar stratospheric clouds.

Pages in category "Noctilucent clouds"

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Media in category "Noctilucent clouds"

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