Jupiterís volcanically active moon Io

Jupiterís volcanically active moon Io

Fig. 9.11 . This composite mosaic shows Jupiterís moon Io in true colors, at approximately what the human eye would see. Black, brown, green, orange and red spots mark active volcanic centers. These volcanoes are turning the satellite inside out, continuously forming and reforming its surface by lava flows. The absence of impact craters suggests that the entire surface is covered with new volcanic deposits much more rapidly than craters are created. This image was taken from the Galileo spacecraft on 3 July 1999. (Courtesy of NASA/JPL/U. Arizona.)

Copyright 2010, Professor Kenneth R. Lang, Tufts University