Not who - what!
It was discovered in December 1985 by the Voyager 2 spacecraft.
William Herschel discovered it.
Uranus's moon Ariel was discovered in 1851. The moon was discovered along with Umbriel, another moon of the planet, by William Lassell.
Ig's about 160 km in diameter and approximately spherical in shape. It has a grey surface and it has a fair number of craters. It is thought to be made from ice and rock, similar to the material that makes up the rings of Uranus.
It was discovered January 11, 1787.
Miranda (The moon of Uranus) was discovered on February 16th 1948
The moon Miranda orbits the planet Uranus and it was discovered in 1948. Uranus has a total of five moons.
Ariel and Umbriel are two of the moons of Uranus. They were discovered around the same time in 1851 by William Lassell.
The moon Cordelia, the closest to Uranus, was one of 11 moons discovered by the space probe Voyager 2, in January, 1986 (one, Perdita, was not recognized as a moon for another 13 years).
Oberon is the outermost major moon of the planet Uranus.
Miranda was discovered by Gerard P. Kuiper on February 16th 1948
Ariel is a moon of the planet Uranus. It was discovered in 1851 and is one of the five major moons of Uranus. Ariel is known for its relatively smooth surface and interesting geological features.
Yes, it is the third one in order among its 27 moons.