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Jupiter doesn't need a moon; but its immense gravity (due to its mass) has attracted over 5 dozen of them: 63, at last count.

Four of them (dubbed the Galilean moons, because they were discovered by Galileo) are among the most massive satellites in the solar system; all of them are larger than any known dwarf planet, with Ganymede being larger than the planet Mercury!

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15y ago

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