Jupiter has 63 known natural satellites.
Although claims are made for the observation of one of Jupiter's moons by Chinese astronomer Gan De in 364 BC, the first certain observations of Jupiter's satellites are those of Galileo Galilei in 1610, who sighted the four large Galilean moons with his 33x telescope.
For more information about the topic Jupiter's moons, read the full article at Wikipedia.org, or see the following related articles:
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