Ganymede is Jupiter's largest moon and is also the largest moon in the entire solar system. It is bigger than both Mercury and dwarf planet Pluto and only slightly smaller than Mars. The moon ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Jupiter’s moon ...

While Ganymede hasn’t yet been observed spewing plumes of water vapor like Saturn’s moon Enceladus, Jupiter’s largest moon is most likely hiding an enormous saltwater ocean. Hubble ...

"We'll explore Jupiter and its icy moons, which are Europa, Ganymede and Callisto with a particular focus on Ganymede, which is a unique object, the only moon with magnetic field and the biggest ...

Ganymede is one of the most complex of Jupiter’s nearly 100 moons—and indeed, one of the most intriguing worlds in the entire solar system. It is the only known moon with its own magnetic ...

Now it’s Ganymede’s turn. Ganymede is Jupiter’s largest moon, and it is thought to be an “ocean world”—a place with underground water that could be habitable for alien life-forms ...