Death Star
The first Death Star is depicted in various sources of having a crew of 265,675, as well as 52,276 gunners, 607,360 troops, 30,984 stormtroopers, 42,782 ship support staff, and 180,216 pilots and support crew. Its hangars contain assault shuttles, blastboats, Strike cruisers, land vehicles, support ships, and 7,293 TIE fighters. It is also protected by 10,000 turbolaser batteries, 2,600 ion cannons, and at least 768 tractor beam projectors. Various sources state the first Death Star has a diameter of between 140 and 160 kilometers. There is a broader range of figures for the second Death Star's diameter, ranging from 160 to 900 kilometers.
Star Wars: Lost Stars
After their graduation, Ciena was assigned to Darth Vader's Star Destroyer, while Thane was assigned to the Death Star as TIE pilot. Both Thane and Ciena watched when Alderaan was destroyed by the Death Star. Both survived the destruction of the Death Star, because Thane was on assignment to investigate the rebel base at Dantooine and Ciena was on board a Star Destroyer.