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

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

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

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

The ringed gas giant Saturn has officially replaced Jupiter as the planet in our solar system with the most moons. The ...

A huge haul of 128 newfound satellites might be a hint of past collisions in the planet’s orbit, or something else.

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

“These moons are a few kilometers in size and are likely all fragments of a smaller number of originally captured moons that ...

Even before the recently announced moons, Saturn had more than anyone could reasonably keep track of. Now, astronomers have ...

NASA’s Juno spacecraft identifies over 40 enormous lava lakes on Io, shedding light on the extreme volcanism sculpting Jupiter’s moon.

Pair that with the increasing likelihood of a subsurface ocean, and though it's still far from a sure thing, that's enough evidence to justify taking a closer look at the Jupiter moon when the ...