Death Star
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 is stated to be more than 100 km to 160 km in diameter, depending on source. It is crewed by an estimated 1.7 million military personnel and 400,000 droids. The second Death Star is significantly larger, between 160 km to 900 km in diameter depending on source, and technologically more powerful than its predecessor. Both versions of these moon-sized fortresses are designed for massive power-projection capabilities, capable of destroying multiple naval fleets or entire planets with one blast from their superlasers.
Death Star
In the animated series "Star Wars Rebels", the two-part episode "Ghost of Geonosis" hinted that the Geonosians were nearly wiped out to extinction out of the Empire's need for secrecy. Saw Gerrera, having been sent to Geonosis to investigate, deduced the Empire possesses a superweapon and resolved to discover the Death Star as depicted in the final season two-parter "In the Name of the Rebellion." Though it was a dead end, finding only scientists being abducted by the Empire, Saw learned the weapon is powered by kyber crystals taken from the Jedha system.