Oberon (moon)

Oberon is the outermost and second-largest major moon of the planet Uranus. It is the second-most massive of the Uranian moons, and the tenth-largest moon in the Solar System. Discovered by William Herschel in 1787, Oberon is named after the mythical king of the fairies who appears as a character in Shakespeare's A Midsummer Night's Dream. Its orbit lies partially outside Uranus's magnetosphere. Oberon likely formed from the accretion disk that surrounded Uranus just after the planet's formation. The moon consists of approximately equal amounts of ice and rock, and is probably differentiated into a rocky core and an icy mantle. A layer of liquid water may be present at the boundary between the mantle and the core. The surface of Oberon, which is dark and slightly red in color, appears to have been primarily shaped by asteroid and comet impacts. It is covered by numerous impact craters reaching 210 km in diameter. Oberon possesses a system of chasmata (graben or scarps) formed during… Read by Arsia Mons. Recorded September 2, 2010; the article may have changed since. The article as it stood when recorded: https://en.wikipedia.org/w/index.php?oldid=382255137 Article today: https://en.wikipedia.org/wiki/Oberon_(moon) Original recording: https://commons.wikimedia.org/wiki/File:Oberon_(moon)_Sep_10.ogg License: CC BY-SA 3.0 (https://creativecommons.org/licenses/by-sa/3.0). This episode is a format-shifted (MP3) copy redistributed under the same license. Chapter images come from the recorded article via Wikimedia Commons; each chapter links its file page for credits. This show is an independent community project, not affiliated with or endorsed by the Wikimedia Foundation.