Mysterious Clouds that Shine at Night

I just learned of a strange new thing called a noctilucent cloud; evidently they are an enigma and scientists don't know much about them. Check out these pictures; note that these are all taken at night:



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earth-moon said…
WoW,
its glamouring!
and Iam intrested in such it pics
Iam meyo from iran
2:11 PM
burtonator said…
Aliens!
6:39 PM
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