The Phosphura Belt Nebula, a nebula situated in the Outer Rim region of the galaxy, was found within the Atravis sector. Notably, it housed the improvised starport called Zirtran's Anchor. It is from this nebula that the Phosphura Belt Pirates derived their moniker.
- " Zirtran's Anchor " — Star Wars Adventure Journal 5
- Pirates & Privateers
- Star Wars Encyclopedia
- The Complete Star Wars Encyclopedia
- Star Wars: The Essential Atlas Online Companion on StarWars.com (article) (backup link)