Nebula System
From FreeSpace Wiki
The Shivan Nebula, known in-game as The Nebula Beyond Gamma Draconis, or simply The Nebula, is, like most nebulae, the remnant of an ancient supernova. It was connected to Gamma Draconis via a Knossos device (on the Gamma Draconis side) and to the Binary System via another Knossos portal.
Canonically, we are given no information about the astronomical identity of this system, however, some evidence suggests it may be the Lupus Nebula. This is not, however, confirmed by ingame sources.