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

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.

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 ...

Like Europa, the enormous pressure exerted on the moon likely keeps the water moving ... of interesting things happening under the surface. Callisto, the outermost of Jupiter’s 95 moons, first ...

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

and Callisto. The Moon is non-luminous, meaning that it does not produce light. We see the Moon because it reflects light from the Sun, and half of the Moon’s surface is always illuminated.

Credit: NASA / ESA / Hubble Heritage Team (STScI / AURA) Callisto, the third largest moon in the entire solar ... rocks more than 150 miles beneath the surface. Both are key conditions known ...