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

More pocked with craters than any other object in our solar system, Jupiter's outermost and second-biggest Galilean moon, ...

Dust off your old telescope on a clear night and look up. If you find Jupiter, you’ll likely see four small dots to the side ...

Gill, CC BY 2.0 But evidence for Callisto ... to Jupiter’s (right) time-varying magnetic field. New research suggests that this reaction, and its results, are indicative of the moon hosting ...

Callisto’s crater-covered surface may be hiding a liquid water ocean. Credit: NASA/JPL-Caltech/Kevin M. Gill, CC BY 2.0. Callisto, one of Jupiter ... they studied the moon’s ionosphere ...

NASA’s Galileo spacecraft, which was designed to study the large, gaseous planet Jupiter and its moons, first caught hints of ...

New evidence from an old NASA mission supports the theory that Jupiter's moon Callisto is in fact an ocean ... rocks more than 150 miles beneath the surface. Both are key conditions known for ...

The hellish surface of a moon of Jupiter known as Io is riddled with hundreds of lava-spewing volcanoes that make the world one of chaos and violence. The brutal conditions also make Io intriguing ...

A total lunar eclipse occurs this month. Venus transitions from evening to morning, while Mars and Jupiter dominate the late ...

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