Two icy moons of Jupiter, though neighboring and of similar size, exhibit radically different internal structures. A new study suggests this dichotomy stems from their very formation, ...

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.

A new study revealed that a massive asteroid may have hit Jupiter’s moon Ganymede about 4 billion years ago, shifting the moon on its axis.

Ganymede is an enormous moon, larger than any other we’ve found, including our own, and may one day be the centerpiece of wider human settlements around Jupiter. Greenland lawmakers form a new ...

Ganymede is a particularly weird place. Not only is it Jupiter’s most massive satellite, it’s the biggest moon in the whole solar system.

An artist's impression of ESA's Jupiter Icy Moons Explorer -- JUICE - in orbit around giant planet, flying past its largest moons (left to right): Ganymede, volcanic Io, Jupiter (with auroral ...

Ganymede’s asteroid was fully 5% of its diameter. That kind of blow not only left a scar, it also knocked the world cockeyed. According to Naoyuki’s calculations, ...

Ganymede is also the only moon in the Solar System with a magnetic field—a bubble-shaped region of charged particles. Scientists have spotted aurorae—as ribbons of glowing, ...

A new study revealed that a massive asteroid may have hit Jupiter’s moon Ganymede about 4 billion years ago, shifting the moon on its axis.