If conditions are clear, anyone with a pair of binoculars or a telescope may even be able to pick out details, such as ...

If there was a contest for the most interesting moon in our solar system, Callisto would be a contender. Jupiter's second-largest moon has more impact craters on its surface than any other ...

Io, Europa, Ganymede, and Callisto orbit Jupiter with periods ranging from ... Named for a sea goddess in Greek mythology, this classic main-belt asteroid orbiting beyond Mars was discovered ...

And it doesn’t stop there. Callisto is also thought to have liquid water, too. The small, rocky body is constantly being stretched and compressed by Jupiter’s huge gravitational force ...