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

New evidence from an old NASA mission supports the theory that Jupiter's moon Callisto is in fact an ocean world. Credit: NASA / JPL / DLR A moon of Jupiter about the size of Mercury likely has a ...

Astronomers have discovered a panoply of new moons orbiting Saturn, bringing the ringed gas giant's total up to 274 moons—far ...

Io’s long-debated magma ocean may not exist. Juno spacecraft data reveals that tidal forces deform the moon differently than ...

Europa, one of Jupiter’s intriguing moons, is hiding an ocean beneath its icy shell — an ocean that might harbor alien life.

Saturn runs rings around Jupiter Ratification of 128 new moons put the smaller gas giant way ahead on satellite count The ...

You thought Saturn's 146 moons were impressive? Think again. The ringed planet's moon count has nearly doubled with the ...

In 2023, Jupiter reclaimed the lead with 12 new moons. However, later that year, astronomers spotted an impressive 68 new ...

The spacecraft is currently on its way to orbit Jupiter and investigate the planet's three ocean-bearing icy moons—Ganymede, Callisto and Europa—with a suite of remote sensing, geophysical and ...