Aurora australis

Aurora australis

Fig. 3.22 . The eerie, beautiful glow of auroras can be detected from space, as shown in this image of the Aurora Australis, or Southern Lights, taken from the Space Shuttle Discovery. The colored emission of atomic oxygen extends upward to between 200 and 300 kilometers above the Earth's surface. (Courtesy of NASA.)

Copyright 2010, Professor Kenneth R. Lang, Tufts University