RARE RED NOCTILUCENT CLOUDS: Noctilucent clouds are supposed to be blue. This past weekend, they turned red. A photographer in Sweden caught the clouds changing color in a rare display that is not fully understood even by experts. Get the full story and see the movie on today's edition of Spaceweather.com.
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Above: Red-topped noctilucent clouds over Vallentuna, Sweden, on July 25, 2020. Photo credit: P-M Hedén. Browse the Noctilucent Cloud Photo Gallery!
