This article is under construction.
The following is an extract from Wookiepedia:
The galaxy was one of the billions of galaxies that existed in the universe. This galaxy was the setting of the histories of the Galactic Republic, the Galactic Civil War, the Yuuzhan Vong War, the Jedi and the Sith. According to some sources, the galaxy was 120,000 light years across, or 37,000 parsecs (a parsec is 3.258 light years), and approximately 13 billion years old. A black hole existed at the center of the galaxy. The galaxy was orbited by seven satellite galaxies: Companion Aurek (also known as the Rishi Maze), Firefist, and Companions Cresh through Grek. However, most of the Companions were described as having ancient, metal-poor stars and not much life. There was also a hyperspace disturbance beyond the edge of the galaxy that prevented hyperspace routes outside the disk. The galaxy had nearly two hundred globular clusters.
The two main worlds the storylines of the Axiom centers on, Nogatan and Vornu, are in the Inner Rim and the Tingel Arm, respectively. Nogatan is located in the Julevian system, and Vornu in the Prindaar system.