Stargate
The MGM franchise is a military science fiction, set in the present day. According to in-universe lore, the Stargate and its network were conceived, built and seeded by an advanced race of humans called 'Ancients'. The first gate found on Earth was discovered on an archaeological dig at near the great pyramid of Giza and acquired by the U.S. Military. Upon finally learning how to activate the Stargate, the gate is regularly used to explore the galaxy, extend diplomatic relations as appropriate and recover technology to protect Earth and its burgeoning allies against a variety of foes.
The titular device was conceived by Dean Devlin and Roland Emmerich. Devlin and Emmerich's concept was developed for the Stargate motion picture and subsequently adapted by Brad Wright and Jonathan Glassner for the MGM franchises- Stargate SG-1, Stargate: Atlantis, Stargate Universe and the feature films Stargate Continuum and Stargate:The Ark of Truth
With a diametre of 6.7 m (22 ft) wide and weighing 29,000 kg (64,000 lb), a stargate comprises a metal ring with 38 symbols representing constellations that rotates within an outer track upon which are 9 chevrons. A stargate is typically operated by its Dial-home Device or 'DHD' that controls power, address input and gate diagnostics. These devices take wide and varied forms across the three franchises. When an active 'gate-address' is entered by a dialing sequence, into the DHD a wormhole is established, culminating in the iconic 'kawoosh' as the wormhole's forming event horizon sheds its velocity and settles inside the stargate.
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