Stories by Dale P. Cruikshank

When Voyager 2 flies by Uranus in January and by Neptune in 1989, it will send back closeup pictures of their icy moons. Ground-based studies of the outer solar system suggest what the probe might find

First observed by Galileo in 1610, these four largest of Jupiter's moons have begun to be explored by passing spacecraft. What is being revealed is unlike anything seen so far in the solar system