Polar Mesospheric Clouds

Polar Mesospheric Clouds

Polar mesospheric clouds (PMCs) are a diffuse scattering layer of water ice crystals near the summer polar mesopause.

Read more about Polar Mesospheric Clouds:  Description

Famous quotes containing the words polar and/or clouds:

    “In time your relatives will come to accept the idea that a career is as important to you as your family. Of course, in time the polar ice cap will melt.”
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    “Who knows whither the clouds have fled?
    In the unscarred heaven they leave no wake,
    And the eyes forget the tears they have shed,
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    —James Russell Lowell (1819–1891)