yes they are very rocky.
rocky
jupiters ice moon is Io
Jupiters Moons
Galileo Galilei
He could only make out four of Jupiters' largest moons.
rocky
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.
Socrates, Gallileo
it's moons
== ==
Jupiters Moons
Jupiter dosent have a surface. And if it did, you wouldn't be able to see the moons because of the 30 mile thick clouds!
jupiters moons are different some have an atmosphere and MOST are asteroids
Jupiter is a gassy planet, that is why it is called The Gas Giant.
Europa has frozen oceans.