Callisto

Digital work

The ancient surface of Callisto is one of the most heavily cratered in the Solar System. A surface made of cratered plains, light plains, bright and dark smooth plains... a contrast of darkness and brightness. Callisto also hides a treasure: A salty ocean 50-200 km deep beneath its surface. Callisto's surface has an averige albedo of about 20%, but small patches of pure water ice, water frost deposits, with an albedo as high as 80% are found on the surface, surrounded by much darker areas. They are located on elevated surface features as crater rims, scarps and ridges.

In the sky, Jupiter with a size of 4º, eight times our Moon seen from Earth. Here it is accompanied by one of its inner moons, Europa.