The Rolor Nebula is a nebular interstellar dust cloud located near the Demilitarized Zone along the Cardassian Union border, just past the Badlands. The Rolor Nebula is located in the general vicinity of Dreon, Kavaria, Free Haven and Delavi. The nebula is also along the flight path between the Bajor system and Dreon. The Rolor Nebula has a high concentration of sirillium. (ST reference: Star Charts; DS9 episode: "For the Cause"; ST - Destiny novel: Gods of Night)