Ganymede Age Threatened by Magnetism
December 2, 2008
The biggest moon in the solar system is Ganymede, the third large moon out from Jupiter. Larger than Mercury, Ganymede has a heterogeneous surface of dark and light areas (picture), grooved terrain, abrupt changes of landforms, and bright splashes where impacts have scarred its icy surface (gallery). What goes on inside, though, is more surprising: […]
