How to Build a Death Star

I'm very excited about seeing Rogue One: A Star Wars Story, which tells the tale summarized in the original Star Wars' opening crawl. This is the story of how the rebels stole the plans to the original "Death Star" – a space station the size of a small moon with a weapon powerful enough to destroy a planet. In Star Wars lore, the 120 km (75-mile) diameter space station was made from quadanium steel (a fictional metal alloy) and crewed by 2m Imperial personnel, including officers, Stormtroo