Cosian Space

Cosian Space was a region with in the Deep Core of the galaxy that contained a knot of star systems. It was the home of both the sentient Cosian species and the closely related Nu-Cosians, who were genetically engineered offshoots of the Cosians.

Behind the scenes
Cosian Space was first mentioned in Star Wars: Aliens of the Galaxy, a reference book written by Jason Fry and released on August 23, 2016.