Ancient asteroid 20 times larger than the one that wiped out the dinosaurs likely hit Jupiter's moon Ganymede

Jupiter’s moon Ganymede may have experienced a significant axis shift due to a massive asteroid impact about 4 billion years ago, according to a recent study. Ganymede, the largest moon in the solar system, is believed to have a subsurface ocean beneath its icy crust. The moon’s surface exhibits deep furrows forming concentric circles, indicating a major impact event. The study suggests that an asteroid, 20 times larger than the one that wiped out dinosaurs on Earth, created a crater roughly 25% of Ganymede’s size. Further research is expected to shed light on Ganymede’s history and internal structure.