Ancient asteroid 20 times larger than the one that wiped out the dinosaurs likely hit Jupiter’s moon Ganymede
By Ashley Strickland, CNN (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 solar system, is even bigger than Mercury and the dwarf planet Pluto. And past research has found
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