Titania

Ownership: UCP
Diameter: 1578 km

Moon of Uranus, Titania is essentially a large dirty iceball - it is composed of about half water-ice and half rock. Although Titania is Uranus' largest moon, it is still much smaller than Triton - the largest moon of Uranus' sister planet Neptune.

Geology

Titania's surface is a mixture of cratered terrain and systems of interconnected valleys hundreds of kilometers long. Some of the craters appear to be half-submerged. Titania's surface is clearly relatively young; obviously some sort of resurfacing processes have been at work.

One theory of Titania's history is that it was once hot enough to be liquid. The surface probably cooled first; when the interior froze it expanded forcing the surface to crack and resulting in the valleys that we see today.

Geography

Titania's surface has an abundance of impact craters and prominent global tectonic features, with large fault valleys some 1500 km (930 mi) long and 75 km (47 mi) wide. The valley Messina Chasmata cuts through the impact crater Ursula (200 km diameter).