A subsurface sea on Saturn’s moon Enceladus ... Pluto’s moon Charon might have lost an ocean. And Europa’s and Ganymede’s oceans are pretty old. That a moon could form a new ocean well ...

At Callisto, during 21 flybys JUICE will study its cratered surface, look for evidence of a subsurface ocean and change the angle of its orbit around Jupiter to help it get into orbit of Ganymede.

A colossal asteroid, estimated to be 20 times larger than the one that led to the extinction of the dinosaurs on Earth, has left a permanent mark on Jupiter’s largest moon, Ganymede. This ...

The measured heights of the tidal peaks in the ice crust, which occur periodically during Ganymede's orbit around Jupiter, will provide clues as to whether there is a liquid ocean beneath the outer ...

and Ganymede. Mimas, a moon of Saturn, and Ceres, the largest asteroid in the solar system, might also have subsurface oceans — but scientists aren't yet sure how big each one might be ...