There may be an ocean under the surface of Enceladus, one of Saturn's moons. The Cassini orbiter has found evidence of this.
Ice and water vapor shoot out of Enceladus. Sometimes they escape the moon's gravity and become part of the rings of Saturn. Cassini has found salt in the ice.
Scientists say the only way this could happen is for Enceladus to have a large body of water -- enough to dissolve minerals that would explain the salt.
