Corrected entry: Whenever we see the stargate on a remote planet being dialed either from an incoming or outgoing wormhole, the inside ring (with the symbols on) never spins. I would imagine this is because it would cost too much money to bring all the equipment needed and use too much time to spin the inner ring on location, as the inner ring always spins when inside the SGC (the set of is obviously always set up). The sound of the ring spinning can even be heard.
Corrected entry: There is no way to fit a twenty foot wide circular hunk of metal that far down into the Cheyenne Mountain Complex. We never see anything larger than a personnel elevator so how did the Stargate get down there?
Correction: In the first episode of series 6 (Redemption), it is explained that there is a retractable roof (remember it used to be a missile complex).
Corrected entry: Off world Stargates do not seem to dial usually. Most times you never even hear the inner ring turning.
Correction: Offworld Stargates are controlled by a Dial-Up Device, they probably don't need to dial themselves up manually like Earth, because earth has no Dialer.
Corrected entry: It's often stated that a wormhole can't form if something is obstructing the Stargate, i.e. sticking through it. However, the ramp in the SGC goes through the Stargate so surely the wormhole couldn't form.
Correction: The wormhole is only prevented from forming if s significant portion of the Stargate is obstructed. Additionally, there is a gap in the ramp where the wormhole forms, as this portion would otherwise be de-materialised by the forming wormhole.
Corrected entry: In an episode of "Stargate: Atlantis", the team uses an Asgard beam to get rid of a Goa'uld parasite from a human. There are several occasions in "SG-1" after this event where they could have performed this procedure. (One is the episode "10x19" when they try to get Ba'al out of Adria, but fail).
Correction: The level of technological understanding in Stargate improves throughout the years so there would have been a time where the idea was deemed was an inappropriate risk. Also the ship assigned to Atlantis has an Asgard on board who would have more knowledge of his own species technology than another species would.
Yeah, beaming technology could only be used to remove a symbiote in Atlantis because of Hermoid. Below's the exact dialogue from "Critical Mass." McKAY: Mmm-hmm. Hermiod's gonna attempt to extract the Goa'uld from Colonel Caldwell using Asgard beaming technology. McKAY: And complicated. The calculations are impossibly intricate. You don't wanna go beaming out a chunk of his brain.
Corrected entry: Throughout the series, Daniel Jackson has worn glasses yet has used the sarcophagus on numerous occasions. If the sarcophagus can heal any wound and even bring back the dead, surely it can correct a small fault in his eyes.
Correction: The sarcophagus heals damage to the body. Daniel's eyesite is a genetic imperfection. The sarcophagus won't work on any defect the user is born with.
Correction: The effects of the sarcophagus have been shown to wear off, which is why the Goa'uld (and others) have to keep using it. In "Need", when Daniel becomes addicted to using the sarcophagus, he eventually doesn't need glasses. But, while a wound won't come back after being healed, a failing organ will continue to fail after time.
Corrected entry: Throughout all episodes, when communicating via radio through the gate, they are always talking in real-time. However, there would be a delay on all transmissions equal to the time it takes for an object to travel through the gate.
Correction: But it's not an object, it's electromagnetic radiation. It can go both ways through an open gate, which solid objects can't; so why can't it move through the gate faster than solid objects?
Corrected entry: Throughout the series, incoming wormholes are indicated by the chevrons lighting up one by one - but the incoming gate could not "know" a connection was coming until the connection had already been made and the wormhole formed.
Corrected entry: The Stargate in the series is slightly different from the one in the movie. The top chevron moves up and down to lock the symbols, the other chevrons just light up. In the Stargate movie, the chevrons all move in and out to select the chevron.
Correction: The movie and series do not go hand in hand. Some changes were made, such as how Ra was actually an unusual looking alien who took over the boy's body.
Corrected entry: Whenever you see the bottom of a Ha'tak vessel (Goa'uld mothership) the pyramid is triangular at the base, but somehow they can still land perfectly on a square pyramid landing-pad.
Correction: The material that the Goa'uld make their ships, and most other things, from can morph and change shape. Look at Ra's guards and ship in the movie or Heur-ur's guards in the series to see this happening.
Correction: Almost all off-world stargates use DHDs to dial out. DHDs allow stargates to "fast-dial": entering the symbols without spinning the inner track. The SGC doesn't have a DHD, so they have to dial "manually" each time by unlocking the inner track with an electrical current and spinning the symbols to the chevrons.