Auroras on Saturn

Auroras on Saturn

. High-energy electrons and ions are captured from the solar wind and funneled down into Saturn's upper atmosphere, creating aurora ovals at its northern (upper left) and southern (lower right) magnetic poles. This ultraviolet image was recorded by the Hubble Space Telescope in October 1997. The bright red aurora features are dominated by emission from atomic hydrogen, while the white regions within them are emitted by molecular hydrogen. (Courtesy of John T. Trauger, Jet Propulsion Laboratory, the Space Telescope Science Institute, and NASA.)

Copyright 2010, Professor Kenneth R. Lang, Tufts University