Twice as powerful

At the feathered edge of the galaxy, the Death Star floated in stationary orbit above the green moon Endor—a moon whose mother planet had long since died of an unknown cataclysm and disappeared into unknown realms. The Death Star was the Empire’s armored battle station, nearly twice as big as its predecessor, which Rebel forces had destroyed so many years before—nearly twice as big, but more than twice as powerful. Yet it was only half complete.

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Star Wars Trilogy, Return of the Jedi Prologue