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The SG-1/Atlantis canon refers to the Stargate universe depicted in Stargate SG-1 and Stargate Atlantis and the universe that this wiki is dedicated to. This universe is based on the one depicted in the Stargate film, but there are some differences. However, it is clear that the events depicted in the film did occur in the SG-1/Atlantis universe and elements of the film are considered canon so long as they aren't directly contradicted by the series.

There are many novels, comics, role playing games and other works set in this universe, meaning they use the characters and elements of the Stargate universe as seen in the SG-1/Atlantis canon to create storylines. Though the role-playing books have been classified as canon, neither the novels nor the comics have had an official word said either way and so it is unclear whether or not they are canon.

Complications within the series

Internal contradictions

There are some elements of the series that are considered to be inconsistences and therefore not exactly canon. For example, in the scene from the SG-1 episode "Solitudes" where P4A-771 is being dialed from the SGC, archive footage of the dialing computer was reused, so the gate address depicted is actually that of Abydos. Since it would be impossible for Abydos and P4A-771 to have the same gate address, the address portrayed in the episode must be inaccurate, despite the fact "Solitudes" is part of the official SG-1/Atlantis canon.

Another issue is that there are some characters who have been portrayed by more than one actor. A notable example would be Elizabeth Weir who was played by Jessica Steen in "Lost City, Parts 1" and "2," but by Torri Higginson for the remainder of the series. Steen and Higginson do have a somewhat similar appearance, but they could hardly be the same person. Since Higginson portrays the character in every episode of Stargate Atlantis and in all her other appearances in Stargate SG-1, her version of the character is considered more canon than Steen's version.

Time travel

Main article: Alternate reality

On more than one occasion, the SG-1's narrative has followed characters jumping backwards in time, effectively creating a new timeline in which history has been changed by their presence. Thus, there are technically four major timelines in which episodes take place: one from Stargate to the beginning of 1969, another from 1969 to the end of 2010, a third from 2010 to Moebius, Part 1, and a fourth from Moebius to the present. The focus of this wiki is the post-Moebius timeline, as it's the setting of the ongoing series as of 2008; however, articles generally assume that this timeline is identical to the two previous ones, except where explicitly shown otherwise.

Alternate timelines created through time travel are distinct from the alternate realities accessible through a quantum mirror or similar technology, which exist simultaneously with one another in the same timeline.

As Stargate: Continuum's story has been said to involve time travel, it may create yet another timeline, but as of 2008 the details of how it will fit in are unknown.

Other Stargate universes

Stargate, the movie canon

File:Strudel.jpg

The "strudel," as it is called by Roland Emmerich, does not exist in the series.

This is the universe depicted in the 1994 science-fiction film Stargate. Bill McCay's Stargate novels are set in this universe, but, as in the SG-1/Atlantis canon, novels are not considered canon, so the original Stargate film remains the only legitimate work set in this universe.

The physical appearances of many characters, notably Jack O'Neill, Catherine Langford and Louis Ferretti, are radically different in this universe, due to them being played by different actors. Other differences are listed below:

Stargate, the movie canon SG-1/Atlantis canon
"Jack O'Neil" "Jack O'Neill"
"Sha'uri" "Sha're"
"Feretti" "Ferretti"
"Sarah O'Neil" "Sara O'Neill"
"Tyler O'Neil" "Charlie O'Neill"
Two Guards attempted to return through the Stargate after it was buried. They were transported into the stone, instantly fossilizing them If a Stargate is buried, it will not be able to activate. Even if some sort of barrier is far enough from the event horizon, the matter heading through will not be able to reintegrate, essentially "splattering" against the barrier.
The Stargate is stored inside Creek Mountain. The Stargate is stored inside Cheyenne Mountain.
The blast doors that obscure the gate are in front of the window in the briefing room. The blast doors that obscure the gate are on the outside of the window in the briefing room.
The briefing room is a couple floors above the control room. The briefing room is directly above the control room.
The symbols are engraved into the gate. The symbols protude from the gate.
The top chevron is a different design than the other chevrons, which appears would make it impossible for this chevron to "lock on to" a glyph. In the film, all the other chevrons locked and the top chevron was not shown when it would have locked. The chevrons do not glow. The top chevron is the same design as the other chevrons. The first six chevrons glow when engaged and only the top chevron locks.
A spinning, funnel-shapped whirlwind ("the strudel") extends from the back of the gate after it's activated. The back of an activated gate has a flat water-like surface like the front. A notable exception is the episode "A Matter of Time," where a similar formation was created when the gate was linked to a black hole.
Abydos is "on the other side of the known universe" and is located in the Kaliem Galaxy. Abdyos is located in the Milky Way and is one of the closest planets in the gate network to Earth. Eight chevrons are needed to reach a gate in another galaxy.
Ra's species is humanoid and it is not explained how he took over the body of an Egyptian boy. Ra's race, the Goa'uld, are snake-like parasitic creatures.
Ra's guards do not have symbiot pouches or marks on their forward, which they would if they were Jaffa, although the Anubis-headed guard had a tatoo of the Eye of Ra on his shoulder. Ra's Jaffa, as seen in "Moebius, Parts 1" and "2," had marks of the Eye of Ra on their foreheads.
Ring transporters use nine rings and the rings land on top of each other. The rings are slightly golden and are about five or six feet in diameter. Ring transporters use five rings and, when they come down, they float without actually making contact. The rings are gray and are about eight feet in diameter.
Death Gliders have open cockpits. Death Gliders have closed cockpits.
As demonstrated in a scene where, according to the subtitles, Ra says "send the bomb down to the Stargate," the word for "Stargate" is not "Chappa'ai." The Goa'uld word for "Stargate" is "Chappa'ai."
Ra's weapon was a small device which fit on his right palm which produced electricity into the victim, causing them to spasm. The standard Goa'uld hand device is a glove worn on the left hand, which emits a beam of energy that brings a person to their knees, eventually killing them.
-- According to the series, Goa'uld motherships have shields that prevent ring transporters from working, making it seem rather foolish for Ra to keep the shields down when he would know the Jaffa he had sent down had been killed. Of course, this could be attributed to his Goa'uld arrogance.
The symbols on Abydos's gate are completely different from those on Earth's. All gates in the Milky Way use a standard set of symbols, except for the point of origin.

Infinity canon

This is the universe depicted in Stargate Infinity, which is based on the universes depicted Stargate and Stargate SG-1, but, once again, there are differences.

Differences with the SG-1/Atlantis universe

  • The "kawoosh" doesn't dissolve whatever it hits.
  • Matter can travel both ways through an open wormhole.
  • Stargates have either seven or eight chevrons instead of nine. (the series itself is inconsistent in this regard)
  • Staff Weapons only stun, though this could be explained as a different staff weapon, as it is no longer used by either Goa'uld or Jaffa.
  • The Ancients are winged, telepathic creatures (in fairness, however, Infinity was produced before the Ancients were revealed in Stargate SG-1, and it's entirely possible that there are more than one "ancient" race)
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