| Astrophotography by Lance Taylor | |
| H1 tags : Noctilucent Clouds - Clouds at extremely high altitude, about 85 km, that literally (as the name suggests) shine at night. They form in the cold, summer polar mesopause and are believed to be ice crystals. Because of their high altitude, in a very dry part of the atmosphere, noctilucent clouds are rather an enigma and are being studied by a number of people around the world.; Observing Noctilucent Clouds - by Dr. Colin Steel |
| Last Update : | 11/December/2011 |
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