The Death Star is a type of fictional mobile space station and galactic superweapon featured in the Star Wars space-opera franchise. The first Death Star, introduced in the original Star Wars film, is stated to be more than 100 km in diameter, and is crewed by an estimated 1. 7 million military personnel and 400,000 droids. The second Death Star, which appears in Return of the Jedi, is significantly larger at between 160 km to 900 km in diameter, and technologically more powerful than its predecessor. Both versions of these moon-sized fortresses are designed for massive power-projection capabilities, each capable of destroying an entire planet with a blast from its superlasers.