yes they are very rocky.
jupiters ice moon is Io
Jupiters Moons
Jupiter's moons were discovered in 1610 do not think I am lying because galileo is my great grand father.
Ganymede is the most massive satellite in the Solar System.
Mercury is a rocky planet, similar to Earth. It has a solid surface and no atmosphere, making it primarily made up of rock and metal.
rocky
jupiters ice moon is Io
we can't use jupiters moons for anything because fistly we can not get out that far to reach Jupiters moon and if we could it would take thousands of years and Jupiters Moons would be to big to do anything with anyway. so the answer to What could Jupiter's moons be used for? is....Nothing.
it's moons
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Socrates, Gallileo
Jupiters Moons
Jupiter is a gassy planet, that is why it is called The Gas Giant.
jupiters moons are different some have an atmosphere and MOST are asteroids
Jupiter and Saturn are the two gassy planets with lots of moons.
Europa has frozen oceans.
planet