The Great Forveen Nebula was a nebula situated within the Mid Rim region of the galaxy. Terex, a one-time agent of the First Order, abandoned the explorer Lor San Tekka within the nebula after abducting him. Once Tekka was left in the nebula, Terex divulged Tekka's whereabouts to the First Order and the Resistance alike, intending to observe which faction would be the first to rescue him.