Oberon🌙

Oberon is the second-largest moon of Uranus and the outermost of the planet’s major satellites, discovered in 1787 by William Herschel. It is about 1,523 kilometers in diameter and is made of a roughly equal mix of water ice and rock, making it one of the darker and more heavily cratered moons in the Uranian system. Oberon’s ancient surface is covered in large impact craters, many with bright central peaks, and long, dark chasms that hint at past internal activity when the moon’s crust may have cracked as it slowly cooled and expanded. Because it orbits farthest from Uranus—about 583,000 kilometers away—Oberon experiences less tidal heating than the inner moons, which may explain why its surface appears older and less geologically active. Some of its dark material may be debris that settled onto the moon from outer space or from the Uranian system itself. Like the other major moons, Oberon is tidally locked, keeping one side always facing Uranus, and only Voyager 2 has captured close-up images of its southern hemisphere, leaving much of the moon still unexplored. Oberon is named after the king of the fairies from Shakespeare’s A Midsummer Night’s Dream, giving this icy, remote world an elegant literary connection.