 But on Jedha they uncovered a surplus of kyber, which would be enough to power their dreaded Death Star.The Death Star, a moon-sized battle station with sufficient firepower to destroy an entire planet, is designed to be the supreme weapon of the Empire's power.Grand Moff Willhuff Tarkin, the station's commander, shortly after informing the heads of the Imperial Military that Palpatine has dissolved the Senate, demonstrates that power in "A New Hope", when he destroys Alderaan as a show of force.