Umbriel (/ ˈʌmbriəl /) 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 …

Nov 3, 2024 · Umbriel is the darkest of Uranus' largest moons. It reflects only 16 percent of the light that strikes its surface, a feature similar to the highland areas of Earth's Moon.

Umbriel, the third nearest and darkest of Uranus's five major moons, in an image made by Voyager 2 on Jan. 24, 1986. Umbriel is also the most heavily and uniformly cratered of the …

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 …

Umbriel, one of Uranus's five major moons, is a celestial body shrouded in mystery. Discovered by Otto Struve on October 8th, 1847, this enigmatic satellite remains largely unexplored, its …

Umbriel [UM-bree-ul] is the thirteenth of Uranus' moons and the third largest. It was named after the dusky, melancholy sprite from Alexander Pope's The Rape of the Lock.

Dec 13, 2025 · Umbriel is a moon that orbits the planet Uranus and has a surface area of 4,296,116.52 and semi-major axis of 266.

The surface of Umbriel is known from images returned by the Voyager 2 spacecraft in late January 1986. It has both the lowest average albedo and the least albedo variation of the …

Umbriel is a moon of Uranus found on October 24, 1851 by William Lassell. It was found at the same time as Ariel.

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 …