Yavin was an orange gas giant, nearly 200,000 kilometers in diameter, located in the Outer Rim Territories. It was orbited by twenty-six moons, three of which could sustain humanoid life. One of those moons, Yavin 4, was once home to the ancient Massassi warriors. During the Galactic Civil War, Yavin 4 was almost destroyed by the Death Star, a planet-killing battle station designed by the Galactic Empire.
It was located on the backward Gordian Reach, a hyperspace route from which the sector got its name. Yavin was best known for its moon, Yavin 4, which was the location of the Rebel Alliance's base prior its discovery and near destruction in the Battle of Yavin. Of its overall total of 26, Yavin had two other moons that were habitable; Yavin 8 and Yavin 13.
Yavin's atmosphere was made up of thick clouds swept about by violent, hurricane-force winds. Any craft that entered the atmosphere without benefit of a tracking beacon would quickly become lost, its pilot disoriented by the buffeting winds. It was believed these storms lasted all the way to the surface without letting up. The immense atmospheric pressure was also something to contend with, and could easily crush an unprotected ship.