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Title: Contrast the densities and compositions of the four Galilean moons. Post by: ppk on Dec 8, 2011 Contrast the densities and compositions of the four Galilean moons.
Title: Re: Contrast the densities and compositions of the four Galilean moons. Post by: duddy on Jan 27, 2012 Closer to Jupiter and dried out by its tides and radiation, Io and Europa are about as dense as our own Moon and made chiefly of rock. But larger Ganymede and Callisto are less stressed, less dense, and have extensive mantles of water and ice above their rock cores.
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