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:
“Professor Fate: My apologies. Theres a polar bear in our car.”
—Arthur Ross. Professor Fate (Jack Lemmon)
“A building is akin to dogma; it is insolent, like dogma. Whether or no it is permanent, it claims permanence, like a dogma. People ask why we have no typical architecture of the modern world, like impressionism in painting. Surely it is obviously because we have not enough dogmas; we cannot bear to see anything in the sky that is solid and enduring, anything in the sky that does not change like the clouds of the sky.”
—Gilbert Keith Chesterton (18741936)