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Noctilucent clouds - NLC
An amazing spectacle in the sky at 1am - noctilucent clouds (NLC) over the Gdańsk Refinery. Silvery clouds are located in the mesosphere at an altitude of about 75-85 km and are the highest clouds that can be seen from Earth. They can be observed when the sun is 6 to 16 degrees below the horizon.
Picture number (ID): 1757
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