The Nekrit Expanse is a huge region in the Delta Quadrant containing an unknown form of interstellar gas. It is several thousand light-years across and is impossible to chart due to its constantly changing structure. There is a trade station at its periphery, overseen by Bahrat.
The USS Voyager crossed the region in 2373, stopping briefly at the station for provisions. (VOY: "Fair Trade")
Inside the Nekrit Expanse, Voyager discovered a deactivated Borg cube and a population of freed drones on a nearby planet. (VOY: "Unity")
Voth scientists Forra Gegin and Tova Veer crossed the Nekrit Expanse while following Voyager's trail. (VOY: "Distant Origin")