This view of Uranus' moon Titania shows many circular depressions probably impact craters.

This full-disk view of Uranus' moon Titania in the early morning hours, a clear-filter image returned by the Voyager narrow-angle camera, shows many circular depressions-probably impact craters. Other bright spots are distinguished by radiating rays and are probably halo craters that mark relatively more recent impacts. Even more interesting are the linear troughs (right) that are probably fault canyons. The troughs break the crust in two directions, an indication of some tectonic extension of Titania's crust. These features indicate that this icy satellite has a dynamic, active interior. Titania is about 1,600 km (1,000 mi) in diameter; the resolution of this image is about 9 km (6 mi).