The Keltros Expanse is a dangerous region of space in the western part of the Hapes Cluster, south of the Lorellon Conduit. The expanse was explored and mapped during the First Expansion Era by the Olanji family and other daring explorers.
The concentrated radiation and thick nebulae clouds in the expanse, which connects to the Transitory Mists, makes navigation and travel in the area extremely difficult.