Uranus has 5 big moons and 10 smaller ones, mostly composed of ice and rock. Many are heavily cratered, but Uranus too has its oddball moon. Miranda, the largest moon, has a surface unlike any other moon in the solar system. The surface is broken into distinct areas that seem to bear no relation to each other. One area may be wrinkled, while the area beside it is hills and craters. It could have been a major impact that gave Miranda its jumbled appearance but it could also have been caused by rising and sinking areas in the interior.

    Oberon is another of the larger moons. Its surface has a dense covering of ancient craters and faults. There is one mountain possibly volcanic about 5 km high.

   Titania is another heavily cratered moon. This world also has many valleys about 100 km wide and hundreds of km long. One valley cuts across the entire surface of the moon.

     Ariel is heavily cratered and fractured but it also shows signs of renewed surface probably by ice flowing up to the surface from impacts.