The largest moon in our solar system may have been knocked off its axis and cracked like an egg four billion years ago by an asteroid bigger than the one that wiped out the dinosaurs on Earth at the ...

Jupiter's moon Ganymede is the largest moon in the solar system and is even wider than the planet Mercury. National Oceanic and Atmospheric Administration The history of our solar system is a ...

The asteroid strike would have "completely removed the original surface" of Ganymede. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Breaking ...

Jupiter is the object you’ll want to be watching this evening, as Ganymede prepares to transit along with its shadow. About an hour before that event starts, Ganymede and Europa line up as the two ...

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, challenging ...

Ganymede transits the face of Jupiter this morning, trailed by its large shadow. The event starts just before 4 A.M. EST, as Jupiter is slowly setting in the west for much of the U.S. (The planet is ...

With Europa and Enceladus getting most of the attention for their subsurface oceans and potential to host life, other frozen worlds have been left in the shadows—but the mysterious Jovian moon ...

Looking for a sky event this week? Check out our full Sky This Week column. November 30: Watch Titan reappear Jupiter is the object you'll want to be watching this evening, as Ganymede prepares to ...