Ganymede close up

Ganymede close up

Fig. 9.22 . The bright icy crust on Jupiterís moon Ganymede contains both young and old terrain with bright grooves, caused by internal stress, and craters due to external impact. The youngest terrain (center) is finely striated and relatively lightly cratered. The oldest terrain (right) is rolling and relatively heavily cratered. The highly deformed grooved terrain (left) is of intermediate age. This image, approximately 89 kilometers across, was taken from the Galileo spacecraft on 20 May 2000 (Courtesy of NASA/JPL.)

Copyright 2010, Professor Kenneth R. Lang, Tufts University