Noctilucent clouds or “night-shining” clouds, are composed of tiny ice crystals. They form in the mesosphere, the highest part of the atmosphere, at altitudes of about 76 to 85 kilometers. They are only visible during deep twilight when the sun ...
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Noctilucent clouds or “night-shining” clouds, are composed of tiny ice crystals. They form in the mesosphere, the highest part of the atmosphere, at altitudes of about 76 to 85 kilometers. They are only visible during deep twilight when the sun ...