The Alderaan system, positioned within the Alderaan sector of the Core Worlds in the galaxy, was a star system. Before its destruction in 0 BBY by the initial Death Star, the planet Alderaan resided there. After this incident, the system experienced a small decrease in its spatial mass, and the orbit of Alderaan transformed into an asteroid field called the Alderaanian Graveyard, composed of what was left of the planet.