Perhaps you're thinking of Titania, one of the moons of Uranus.

Here are some facts about Titania:

* Largest moon of Uranus: Titania is the largest moon of Uranus and the eighth largest moon in the Solar System.

* Named after a Shakespearean character: Titania is named after the queen of the fairies in Shakespeare's "A Midsummer Night's Dream."

* Ice-covered surface: Titania is primarily composed of ice, with a rocky core.

* Possible internal ocean: Scientists believe that Titania may have a liquid water ocean beneath its icy surface.

* Craters and canyons: Titania's surface is heavily cratered and has a network of canyons, suggesting past tectonic activity.

* Thin atmosphere: Titania has a very thin atmosphere, which is likely composed of nitrogen and methane.

* Orbits Uranus at a distance: Titania orbits Uranus at a distance of about 436,000 kilometers (271,000 miles).

If you have any further questions about Titania or other moons in our solar system, feel free to ask!