Hubble Space Telescope Resolves Volcanoes on Io
The giant gaseous planet Jupiter and its moon Io are featured in this Hubble telescope picture.
One of Io's many volcanoes, Pele, appears as a dark spot surrounded by an irregular orange oval on the lower part of the moon. The orange material has been ejected from the volcano and spread over a huge area. Though the volcano was first discovered by the Voyager spacecraft, the distinctive orange color of the volcanic deposits is a new discovery.