The smallest of Uranus's large moons, Miranda, 293 mi (472 km) in diameter, has been described as “the most bizarre body in the solar system,” with the most geologically complex surface. Miranda's remarkable terrain consists of rolling, heavily cratered plains (the oldest known in the Uranian system) adjoined by three huge, 120- to 180-mile (200- to 300-kilometer) oval-to-trapezoidal regions known as coronae, which are characterized by networks of concentric canyons.

Umbriel and ArielThe Uranian MoonsPuck