Oberon is the outermost of Uranus's five big moons, and the second biggest.
Its old, cratered face has dark patches on some crater floors, like something seeped up from inside.
William Herschel found it on the same night as Titania in 1787. It's named after Titania's husband, the king of the fairies.
If you stood here
Cold, dark and cratered, about −200 °C, with Uranus small but clear in the sky.
- Width
- 1,523 km
- Goes round Uranus
- every 13 days
- One day
- The same: it always shows Uranus one face
- Temperature
- about −200 °C
- 70 kg on Earth weighs
- 2 kg here
