On Star Wars, Yavin IV was a inhabitable satellite of the giant gas planet Yavin Prime. After the fall of the Empire, Luke Skywalker installed a Jedi Academy on the surface.
On Second Life, a Yavin IV sim was the home of the New Order of the Jedi. The sim moved and was enlarged on december 2007. The New Order of the Jedi left it for Ruusan on May 2008, leaving Yavin IV to the Kalway Order of Jedi.
In January 2009, the Cathar sim was rebuilt to another Yavin 4, unrelated with the existing ones.
- For the former sim, Yavin 4, homeworld of the New Order of the Jedi see Yavin 4 (NOJ)
- For the current set of sims, Yavin 4, homeworld of the Kalway Order of Jedi and FCRS see Yavin 4 (KOJ)
- For the short living sim Yavin 4 of Galactic Unity see Yavin 4 (GU)