The Death Star refers to any of several fictional mobile space stations and galactic superweapons appearing in the Star Wars science-fiction franchise created by George Lucas. The First Death Star was stated to be 87 mi (140 km) in diameter with a volume of 220,781 cubic miles, or (to give perspective) approx. 1/25 the size of our Moon. It was crewed by an estimated 1.7 million military personnel and 400,000 droids. The Second Death Star was significantly larger–99 mi (160 km) in diameter—and more advanced than its predecessor. Both versions of these dwarf planet-sized fortresses were designed for massive power projection capabilities, capable of destroying an entire planet with one blast from their superlasers.