Noctilucent Clouds over Moscow . ... Shining in the darkened sky above are widespread noctilucent clouds . From the edge of space, about 80 kilometers above Earth's surface, the icy clouds can still reflect sunlight even though the Sun itself is below the horizon as seen from the ground . ... During this northern summer, NASA's AIM mission provides daily projections of the noctilucent clouds as seen from space . ... NASA Web Site Statements, Warnings, and Disclaimers . ...