According to the Dark Empire Sourcebook, Byss orbited a binary system of a blue star and blue dwarf, but according to Byss and the Deep Core, Byss is in a single-sun system.
- Dark Empire Sourcebook
- The Essential Guide to Planets and Moons
- Star Wars: Empire at War: Prima Official Game Guide
- Star Wars: Empire at War: Forces of Corruption Expansion: Prima Official Game Guide
- The Complete Star Wars Encyclopedia
- The Essential Atlas
- The Essential Guide to Warfare
- Star Wars: Age of Rebellion Core Rulebook