The few known worlds of the Deep Core include Byss (whereto the disembodied consciousness of Emperor Palpatine fled after his death at the Battle of Endor, according to Expanded Universe literature), Khomm, Ruan, and the Empress Teta system. The intense radiation and relatively young stars mean that it has very few habitable worlds compared to the rest of the galaxy. It has countless stars packed together in a relatively small area, so hyperspace travel is slow and dangerous.

The Deep Core is at the center of the galaxy, even closer than the Core Worlds like Coruscant and Alderaan. The Core can be divided into three regions: The Deep Core, the Core Worlds and the Colonies (sometimes considered a separate region). The Galaxy is divided concerning the type of life it holds and the distance from the core as well as the trade in each. It is referred to in several official publications as the Galaxy or the Known Galaxy. The Star Wars galaxy is the fictional setting for the Star Wars franchise.

:'for the Star Wars themed MMORPG on PC, see' ' Star Wars Galaxies'