Uh, at least one of the Moons of Jupiter is covered in a water ocean, frozen for several miles down.
It still has to be discovered whether Europa has a liquid water ocean, some slushy stuff, or if the moon's water is frozen solid through and through. The cracks on the surface suggest that it could have liquid water seeping up, though.
Uh, at least one of the Moons of Jupiter is covered in a water ocean, frozen for several miles down.
Sure would take a lot of energy to melt that ice and break down the hydrogen-oxygen bonds. The moon could then de-gas and perhaps create an atmoshere. According to Buck Rogers, anyway.