If there was a contest for the most interesting moon in our solar system, Callisto would be a contender. Jupiter's ...

In the 1990s, however, NASA's Galileo spacecraft captured magnetic measurements near Callisto that suggested that its ice shell surface—much like that of Europa, another moon of Jupiter—may ...

The spacecraft had 35 encounters with Jupiter's major moons, including eight with Callisto, before the mission ... rocks more than 150 miles beneath the surface. Both are key conditions known ...

increasing the movement of particles and a higher likelihood of interesting things happening under the surface. Callisto, the outermost of Jupiter’s 95 moons, first caught NASA’s attention ...

Europa is the sixth largest satellite in our Solar System and the smallest of Jupiter’s four Galilean moons. Discovered by ...

Callisto would be a contender. Jupiter's second-largest moon has more impact craters on its surface than any other planetary body in the solar system, and it has tons of ice on its surface as well.

New evidence from an old NASA mission supports the theory that Jupiter's moon Callisto is in fact an ocean world.