Sullust was a barren, obsidian world of lava streams and turquoise lakes. Native fauna such as ash angels foraged during the day and returned to nest at night, while rockrenders prowled the planet’s underground. Because the planet’s atmosphere was highly toxic, native Sullustans lived in technologically advanced subterranean cities that were highly regarded for their beauty. They commuted to work by lifts and shuttles that carried them to the factories on the planet’s surface, alternating between day and night shifts. The SoroSuub Corporation employed roughly half the population of Sullust and the world was the center of the company’s industrial empire, with famous factories manufacturing starships. Indeed, shipyards existed at Sullust.

Sullust lay on the Rimma Trade Route, which connected it to Vondarc and Eriadu. It also acted as a junction onto the Incisor Sidestep route, which connected it to Anoat and the secret Sanctuary Pipeline, which connected it to Endor. Sullust’s capital city was Pinyumb, a cavern city based at the bottom of the volcanic mountain Inyusu Tor.