The Hubble Space Telescope has seen Jupiter's Great Red Spot oscillating in width as it drifts around the planet. Could this ...

The cataclysmic collision was so devastating it created the largest impact crater in the solar system and knocked the supersized satellite off its axis, new simulations show. Ganymede is Jupiter's ...

(CNN) — Jupiter’s moon Ganymede may have shifted on its axis when a massive asteroid smashed into it about 4 billion years ago, according to a new study. Ganymede, the largest moon in the ...

Around 4 billion years ago, an enormous asteroid that was at least 10 times larger than the space rock that wiped out the dinosaurs smashed into Jupiter's massive icy moon, Ganymede. The cataclysmic ...