Umbriel (/ ˈ ʌ m b r i ə l /) 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.

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. Other Uranian moons are much brighter. The process by which Umbriel's ancient cratered surface was darkened remains a mystery.

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 major Uranian moons, an indicator that its surface experienced little reworking by …

Apr 27, 2019 · Umbriel is the darkest (and third largest) of the five spherical moons of Uranus and one of the 19 spherical moons in the solar system. Like other moons of Uranus, Umbriel was also named after a character from Alexander Pope’s work.

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. Umbriel was discovered by William Lassell in 1851.

Jan 1, 2010 · Umbriel (a character in The Rape of the Lock by Pope) is the darkest moon of Uranus. It is also the least geologically active satellite with a heavily cratered surface indicating that it is old. Near the equator of Umbriel is a bright ring referred to …

In 1851 the British astronomer William Lassell discovered a moon orbiting Uranus, which we now call Umbriel. This icy rock orbited Uranus uninterrupted for another century before NASA scientists sent the Voyager 2 probe to take a closer look.

Sep 26, 2019 · Umbriel (“UM bree el”) is the thirteenth of Uranus’s known satellites and the third largest: orbit: 265,980 km from Uranus. diameter: 1170 km. mass: 1.27e21 kg. Umbriel is a character in Alexander Pope’s The Rape of the Lock. Discovered by Lassell in 1851. Umbriel and Oberon appear quite similar though Oberon is 35% larger.

A cold, blue-green ice giant planet tipped nearly sideways on its axis, with a set of narrow rings and a family of at least 27 moons named after literary characters.

Let’s look at some interesting facts about the moon Umbriel. Umbriel has a radius of approximately 383 miles (584.7 km). This makes Umbriel about 1/3 the size of the Earth’s moon, and 1/5 the size of the biggest moon in our solar system, Ganymede.