They found water on the moon (care of Nat'l Geo). So, by my amateur calculations, we have water on Earth, Jupiter's moons, Mars and the Earth's moon. Only life on Earth though, unfortunately.
Anyway, back to the moon. They JUST discovered water molecules embedded in volcanic glass beads that were brought back from the moon by the Apollo missions in the 60s and 70s. Pretty startling stuff, especially because it throws a wrench in astronomers' long held theory that the moon was formed 4.5 billion years ago by a planet colliding with earth. For that to happen, the explosion would have reached a certain temp (that of molten solids) and would have vaporised the molecules that form water. So, the debate rages.
For some cool facts on the Moon, go here.
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