[quote]They are nothing but gas and have no solid ground.[/quote] uhhhh, what? Gas Giants have solid rocky cores, they are relatively small compared to the large balls of gas surrounding them, but you cannot fly through the center of a Gas Giant and come out on the other side, they do have solid ground, there is just too much pressure to be able to go there. Saturn and Jupiter have a large number of satellites though. And I am not sure why other people are saying you could go to the moon. He is asking about the Gas Giants in our solar system, the moon orbits Earth.

Planets have moons too. It isn't all about the planet itself.

moons.