This is a composite image of Jupiter's volcanic moon Io and Europa taken during a March 2, 2007 flyby by NASA's New Horizons spacecraft. Here Io (top) steals the show with its beautiful display of ... more 
This is a composite image of Jupiter's volcanic moon Io and Europa taken during a March 2, 2007 flyby by NASA's New Horizons spacecraft. Here Io (top) steals the show with its beautiful display of volcanic activity. Three volcanic plumes are vi less 
1 / 29
SPACE.com | Photo By NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute
Fri, Apr 5, 2013 4:24 PM EDT