UMBRIEL: URANUS' MYSTERIOUS MOON

Umbriel is one of five large moons orbiting the planet Uranus. Discovered by British astronomer William Lassell in 1851, Umbriel is part of a group of Uranus' moons with unique and mysterious characteristics. With a diameter of about 1,169 kilometers (700 miles), Umbriel is the third largest moon of Uranus after Titania and Oberon. This moon has se