What is Oberon (moon)?
[[File:Voyager 2 picture of Oberon.jpg|thumb|right|Image of Oberon obtained by Voyager 2 in 1986]] '''Oberon''' is the farthest big [[Satellite (natural)|moon]] of the planet [[Uranus (planet)|Uranus]]. It is made of about half ice and half rock.<ref> {{cite web |url=http://apod.nasa.gov/apod/ap960408.html |title=APOD: April 8, 1996 - Uranus's Moon Oberon: Impact World |publisher=apod.nasa.gov |accessdate=2009-05-03 |last= |first= }} </ref> With a mean [[radius]] of about 760&nbsp;km, Oberon is the second biggest moon of Uranus's 27 moons. It [[orbit]]s Uranus about every 13.4 days.<ref name=ch> {{cite web |url=http://www.solarviews.com/eng/oberon.htm |title=Oberon, A Moon Of Uranus |publisher=www.solarviews.com |accessdate=2009-05-03 |last=Hamilton |first=Calvin }} </ref> It was found on January 11, 1787 by [[William Herschel]],<ref>{{cite web |url=http://solarsystem.nasa.gov/planets/compchart.cfm?Object1=Ura_Oberon&Object2=Uranus |title=Solar System Exploration: Planets: Comparison Chart |publisher=solarsystem.nasa.gov |accessdate=2009-05-03 |last= |first= |archive-date=2009-04-23 |archive-url=https://web.archive.org/web/20090423110001/http://solarsystem.nasa.gov/planets/compchart.cfm?Object1=Ura_Oberon&Object2=Uranus |url-status=dead }}</ref> in the same year he found [[Titania (moon)|Titania]]. It was named after a Oberon, King of the Fairies, a character in [[William Shakespeare]]'s play [[A Midsummer Night's Dream]]. Oberon has several large impact [[crater]]s where it has been hit by [[meteorite]]s. These were photographed by the [[Voyager 2]] [[spacecraft]] in 1986 as it flew passed.<ref name=ch/> Scientists also believe there is a mountain that could be {{convert|20|km|mi|0|lk=on|abbr=on}} high on the moon.<ref>{{cite web|last=|first=|title=Uranus' Moon Oberon - Explore the Cosmos|url=http://www.planetary.org/explore/topics/uranus/oberon.html|url-status=dead|archive-url=https://web.archive.org/web/20090831112934/http://www.planetary.org/explore/topics/uranus/oberon.html|archive-date=2009-08-31|publish