This is an image of Europa
Click on image for full size
Courtesy of NASA
Icy moons are moons which are made
of ice. These moons are unlike the earth's moon, which is made of rock
Perfect examples of icy moons are 3 of the Galilean satellites, Europa, Ganymede, and Callisto. Except maybe for Europa and Triton, these moons have no air.
But the surfaces of these moons, especially Ganymede, show proof that in their history, something may have happened inside which changed the way the moon looks today. Activity inside the moon could also provide an environment in which life could exist.
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The diagram to the left shows a cutaway of the possible interior structure of an icy moon. The drawing illustrates what used to be postulated for Jupiter's moon Ganymede. Icy moons are mostly made of...more
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Miranda was discovered by G. Kuiper in 1948. Miranda one of the smallest icy moons, and is as wide as the distance from Los Angeles to San Francisco. The surface features of this moon are hard to see in...more
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