Looking down from above, AIM captured this composite image of the noctilucent cloud cover above the Southern Pole on December 31, 2009.
Looking down from above, AIM captured this composite image of the noctilucent cloud cover above the Southern Pole on December 31, 2009. The 2009 cloud season began a month before the 2010 season. Credit: NASA/HU/VT/CU LASP