Umbriel

Umbriel () is the third-largest moon of Uranus. It was discovered on October 24, 1851, by William Lassell at the same time as neighboring moon Ariel. It was named after a character in Alexander Pope's 1712 poem The Rape of the Lock. Umbriel consists mainly of ice with a substantial fraction of rock, and may be differentiated into a rocky core and an icy mantle. The surface is the darkest among Uranian moons and appears to have been shaped primarily by impacts, However, the presence of canyons suggests early internal processes. The moon may have undergone an early endogenically driven resurfaci

crater on the surface of Uranus' moon Umbriel

crater on the surface of Uranus' moon Umbriel

crater on the surface of Uranus' moon Umbriel