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1. Oberon, King of the Fairies, is a character in William Shakespeare's play, "A Midsummer Night's Dream".

2. Oberon is the name of the outermost of the major moons of the planet Uranus; discovered 1787 by William Herschel. All of the moons of Uranus are named for characters from Shakespeare or Alexander Pope. Names for the first four discovered moons of Uranus (Oberon, Titania, Ariel, Umbriel) were given by John Herschel, the son of William.

Data for Oberon:

  • Diameter: 1550 km
  • Surface area: 7,300,000 km2
  • Orbital radius: 583,400 km
  • Orbital period: 13.46 days
  • Rotational period: 13.46 days

Oberon is composed of roughly 50% water ice, 30% silicate rock, and 20% methane-related carbon/nitrogen compounds. Its ancient cratered surface shows little sign of internal geological activity.

3. Oberon is both a software environment and a programming language, created in 1985 by Niklaus Wirth and Jürg Gutknecht. Although it can be used as an entire operating system/application suite, it can be run as an application itself inside many other environments, including Linux (and a few other Unix systems), Microsoft Windows and Macintosh. See Oberon programming language.