image credit: NASA
Here are Jupiter and its Galilean moons, which Galileo saw through his crude telescope--and you can see them easily through a small telescope, too. For a simulation of observations of the Galilean moons, see Jupiter's Moons. To find out about the whole Jupiter system, visit the NASA site Jupiter: Moons.
The inward force of Jupiter's gravity keeps each of Jupiter's moons in its orbit.
(This feature was updated on July 17, 2013.)
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