Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Pages: 43. Chapters: Stargate, Ancient technology in Stargate, List of starships in Stargate, Earth technology in Stargate, List of Earth starships in Stargate, Goa'uld technology in Stargate, Atlantis. Excerpt: A Stargate is a portal device within the Stargate fictional universe that allows practical, rapid travel between two distant locations. The devices first appear in the 1994 Roland Emmerich film Stargate, and thereafter in the television series Stargate SG-1 and its spin-offs. In these productions the Stargate functions as a plot generator, allowing the main characters to visit alien planets without the need for spaceships or any other fictional technology. Within the Stargate fictional universe, Stargates are large rings composed of a fictional superconductive mineral called naqahdah. Each Stargate has nine points (chevrons) spaced equally around their circumference which are used to determine the address being dialed. On the inner ring are 39 unique glyphs (36 in the Stargate Atlantis series) representing star constellations and one symbol representing the planet or point of origin. Six such symbols and the point of origin serve to map out a specific location in space to which to dial. Additional glyphs may also be selected which increase the distance of travel, allowing gates outside the current galaxy to be reached. This process requires significantly more energy than in galaxy dialing. Pairs of Stargates function by generating an artificial stable wormhole between them, allowing one-way travel through. A typical Stargate measures 5.7 m (19 ft) in diameter and weighs 29,000 kg (64,000 lb). The Stargates were created millions of years ago by an alien race known as the Ancients; their modern history begins when Egyptologist Daniel Jackson deciphers their workings in the Stargate film. The basic notion of the stargate concep...