In our own solar system, around the giant planet Jupiter are orbiting various moons. One of these is Europe, made of ice. There, the landscape could look like this : ice cristals around deep cracks into the frozen crust. And, several kilometers under the surface, maye, a liquid ocean... Copyright notice : the whole content of this picture is absolutely made by the author or generated by following software : Vue d'esprit 4.0, except for that source : Jupiter clouds map from NASA (http://maps.jpl.nasa.gov/).