Thanks to the Cassini spacecraft, it is believed that Saturn’s largest moon, Enceladus has a global ocean. Cassini detected a slight wobble in the moon indicating that liquid underneath the moon’s icy crust is present and moving. An ocean under the surface increases the odds of finding life. This ocean under the crust of Enceladus maintains its liquid form due to Saturn’s gravitational pull which creates friction and keeps the ocean from freezing. The presence of jets spewing vapor into space is further evidence that this is the case.