With a diameter of 5,268km, Ganymede is the largest moon in the Solar System One of the fascinations of Ganymede - and of Callisto and Europa - is that they all likely have oceans of water below ...

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 ...