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

Astronomers have uncovered new evidence that Jupiter’s moon Callisto likely harbors a massive underground ocean, potentially joining Europa and Ganymede as another water-rich world in the outer solar ...

If there was a contest for the most interesting moon in our solar system ... and Geophysics Group at NASA's JPL, didn't start out looking for an ocean on Callisto. According to Cochrane, the ...

Callisto is the third-largest moon in the entire solar system ... READ MORE: {{title}} NASA’s Galileo spacecraft, which was designed to study the large, gaseous planet Jupiter and its moons ...

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 of the gas giant: they are the Galilean moons, four of the 95 natural ...

Jupiter’s four largest moons – Io, Europa, Ganymede and Callisto – were the first ever discovered orbiting another ... If ...

NASA's Europa Clipper ... Space Agency's Jupiter Icy Moon Explorer (JUICE) — which will also be exploring Europa, in addition to its larger cousins Ganymede and Callisto — performed a daring ...