: Building began in space above Geonosis approximately one year before the end of the Clone Wars. The Empire used various construction modules and later relocated the station to hidden sites to maintain secrecy.
: Creating the planet-killing beam was the most difficult part. Director Orson Krennic oversaw a team of scientists on Eadu who worked to harness kyber crystals to power the weapon. Death Star (Star Wars)
: Lead engineer Galen Erso intentionally stalled development for years after learning the project's true purpose. He also built a secret "fatal flaw" into the thermal exhaust port, which the Rebel Alliance later exploited. : Building began in space above Geonosis approximately