In the TNG episode "Rightful Heir", the clone of Kahless refers to a Klingon legend, telling of his return near a star that is visible from the night sky of the Klingon homeworld. This, combined with the Klingons' strong religious tradition, could suggest that religious beliefs might have been a driving force behind early Klingon space travel. However, several sources from the "" universe have stated that space travel was one of the legacies left behind by the marauding Hur'q, who pillaged the Klingon homeworld of Qo'nos, taking with them the sacred treasures of the Klingons, including the Sword Of Kahless. Kahless's star has at least one planet orbiting it, and the first Klingons who landed there built a monastery. Warriors that came after have visited, hoping to receive enlightenment through a vision of Kahless.