Editing Stargate (device) (section)

===Television===
For most of the run of ''[[Stargate SG-1]]'', Earth was under constant threat from the Goa'uld, and is no match for their superior technology. In the face of this threat, the US Air Force established a top-secret base, [[Stargate Command|the SGC]] (Stargate Command), as a frontline defence. Multiple teams are formed and sent on missions through the stargate, their primary objective being exploration, and through it the discovery of intelligence, technology and allies to help in the fight against the Goa'uld. The primary team is called [[SG-1]], and the series follows their adventures.

For a long time, it was thought that the Goa'uld were the builders of the Stargate network, but it was later discovered that they had merely made use of the relics left behind by a different and extinct race, the Ancients. At the climax of ''SG-1''<nowiki>'</nowiki>s 6th season, Daniel Jackson discovers that the Earth myth of [[Atlantis]] is in fact founded on the Lost City of the Ancients, and Season 7 is spent trying to locate it. At the beginning of the show ''[[Stargate Atlantis]]'', which coincides with the beginning of ''SG-1''<nowiki>'</nowiki>s 8th season, the city is found in the Pegasus Galaxy, and 8 chevrons are dialed to send an expedition there on what could be a one-way trip, due to the massive power required to generate a wormhole to another galaxy. It is there that they discover a new network of stargates, and are plagued by the nemesis of the Ancients, the [[Wraith (Stargate)|Wraith]]. During the events of ''[[The Ark of Truth]]'', it is revealed that the pre-ascended Ancient known as Amelius originated the concept of the Stargate and wormhole travel.

In the events of the third television series, ''[[Stargate Universe]]'', a third generation of stargates is discovered, which allegedly predates the model originally discovered in the Milky Way galaxy. This model, discovered as a result of a three-month expedition to unlock the stargate's ninth and final chevron, was first encountered on board the ancient research vessel ''Destiny'', which has been traversing the universe for several million years uncrewed, and is several billion light years away from Earth. It is discovered that the Ancients constructed the vessel to be launched after a number of stargate seed ships were dispersed in the universe in order to follow in their path and stop at each planet at which a stargate was deposited. ''Destiny'' would then extract any relevant data from the planetary stargate in order to further complete research into an apparent signal embedded in the [[Cosmic microwave background radiation]]. This "prototype", or "beta", generation of gates has a limited range; one storyline in the series saw an exploratory team being left behind when ''Destiny'' jumped into hyperspace without them, requiring them to plot the ship's course and travel to various other "beta" Stargates until they found one in range of ''Destiny''. In addition, when a dialing sequence commences, the entire ring (as opposed to an inner track, like Milky Way-era gates) rotates clockwise and counterclockwise in an alternating pattern until the final chevron is locked and a wormhole is established. Finally, the event horizon of the wormhole also appears a slightly more silver color than later generations. Possibly due to the nature of how these stargates were deposited on hundreds of thousands of planets, no planetary DHD is present. Rather, explorers from ''Destiny'' are required to bring an Ancient remote control that can command the gate to dial an address in addition to other functions, presenting them with a list of accessible Stargates.