Summary:
- A massive asteroid, estimated to be 10 times larger than the one that wiped out the dinosaurs, smashed into Jupiter's largest moon, Ganymede, billions of years ago.
- The impact was so powerful that it knocked Ganymede off its axis, causing it to tilt by several degrees and altering its magnetic field.
- This discovery provides insights into the early history of the solar system and the formation of Jupiter's moons, as well as the potential for large-scale impacts to significantly reshape planetary bodies.