A Death Star represented an immense space station whose primary armament was a planet-obliterating superlaser. This weapon derived its power from kyber crystals.
The DS-1 Death Star Mobile Battle Station, also known as the DS-1 Orbital Battle Station, was initially conceived by the Geonosians. The Galactic Republic, and subsequently the Galactic Empire, assumed control of project Stardust. The plans detailing the battle station's design were stolen by the Rebel Alliance during the Battle of Scarif, ultimately leading to its demise at the Battle of Yavin. Before its destruction, the Death Star unleashed its planet-destroying cannon upon Alderaan, Jedha City (located on Jedha), and the Imperial Archives situated on Scarif.
Following the obliteration of the first Death Star, the Galactic Empire constructed the DS-2 Death Star II Mobile Battle Station. This second iteration of the Death Star was intended to surpass the original in power and served as the final Death Star. During the events of the Battle of Endor, the Rebels exploited the Death Star II's incomplete superstructure after its energy shield was disabled, leading to its destruction in a similar manner to its predecessor.