Stargate (device)
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Stargates are large, ring-shaped devices in the Stargate science fiction universe that utilize advanced technology for nearly instantaneous personal travel across the vast distances of space. These devices were first seen in fiction with the 1994 film Stargate, directed by Roland Emmerich, and then subsequently in the television series Stargate SG-1 and Stargate Atlantis (as well as the animated series Stargate Infinity). The Stargate is the central plot generator of these productions, allowing for stories focused on a small team of protagonists exploring other planets and meeting other races on foot, rather than the more prevalent, grandiose "space opera" of interstellar starships seen elsewhere in science fiction.
Stargates are marked out by nine "chevrons" spaced equally around their circumference, and 39 symbols displayed on an inner ring (note: site requires Flash). Although typically 22ft (6.7m) in diameter and held to be made of the fictional heavy mineral "Naqahdah", the gates are almost always seen standing vertically.
In the mythology of the canon, their creators were an alien race known as the Ancients, who scattered them on a variety of planets and moons, throughout the Milky Way and other galaxies millions of years ago. In |test2=|val2=show|then= (Stargate , Teal'c stated that many were later terraformed by the Goa'uld. Collectively, these comprise what is called the "Stargate Network", as they facilitate interaction between distant planets. The plot of Stargate effectively begins when the United States Air Force discovers how to use one of these devices that is discovered on EarthStargate (1994) | [Producer comments] and begin to explore the galaxy through its use. Although Stargates are present on many planets, most of the races they encounter are relatively primitive, and view the gates as no more than divine, sacred or terrifying relics, as evidenced by such names as "Ring of the Gods" | [Transcript] and "Circle of Darkness" | [Transcript].
- 1 Conceptual origin
- 2 Operation
- 3 Complexities of function
- 3.1 Matter transmission
- 3.2 Gate obstruction
- 3.3 Power source
- 3.4 Secondary gates
- 3.5 Durability
- 3.6 Exceptions
- 3.7 Other uses
- 4 Surrounding plot
- 5 Milky Way
- 6 Pegasus galaxy
- 7 Ori \"Supergates\"
- 8 Making of the props
- 9 Other uses of the concept
- 10 See also
- 11 References
Conceptual origin
The idea of the Stargate was invented by the writers of the original feature film of the same title, Dean Devlin and Roland Emmerich. Similar devices have been seen in previous fiction, but the complete conception of a Stargate, as seen in the Stargate canon, is quite original — though there has been contention as to whether they plagiarised the idea from a previous script submission. The name was a logical choice ("gate to the stars"), but in retrospect has caused the series and film to be mistaken for the unrelated series Star Trek and Star Wars. The Stargate was further developed conceptually by the creators of the spin-off television series Stargate SG-1, Brad Wright and Jonathan Glassner.
The concept of a Stargate is based heavily in theoretical physics (and Astrophysics), particularly that of black holes and wormholes. A wormhole is a warping of spacetime that causes space to become "folded", supposedly allowing for "shortcuts" through space. Although these may exist in reality, it is not widely held to be true that any such phenomenon could safely transport a human being, as such wormholes would most likely be created by excessive gravity which would destroy any potential traveller.
The idea of a "portal" for travellers has been seen often throughout the history of both fantasy and science fiction, often taking a similar form, a device or magical object shaped as a regular or irregular closed geometric form filled with a water-like, rippling puddle that represents the boundary point between two locations (see below: common envisioning). The Stargate picks up on this conception, emphasising the "watery puddle" for the sake of an alien mystique, and explaining it all in terms of advanced technology.
Operation
The film Stargate rushed very quickly over how a Stargate actually works and is operated, but the subsequent television shows go into this area in a great amount of detail. In SG-1, it is explained that a Stargate's destination is not fixed, but is singled out by a process known as "dialing". Once a destination is selected by the traveller, the Stargate generates a wormhole between itself and a complementary device at the destination, by being supplied with a threshold amount of raw electricity. Objects in transit between gates are broken down into their individual elemental components, and it is this "wormhole" that the atoms travel through, before being reconstructed on the other side.Dialing
Each location served by a Stargate has its own unique "address", which is a combination of six or more non-repeating | [Transcript]. "seven symbols chosen from a pool of 38 non-repeating candidates, that's about 63 billion possible combinations." symbols appearing on the dialing Stargate. By "dialing" these symbols in the correct order, the traveller selects a destination.
The show is consistent with the mechanics of address-dialing. The process involves associating a unique symbol of the inner ring to each of at least the first seven of the chevrons on the outer circumference. The main "address" is invariably dialed first, followed by the gate's "origin" symbol, which acts as the final trigger for the completion of the address sequence."Chevron 7, locked"; multiple episodes including the original film. As each symbol is dialed, the chevron is said to "engage" and usually responds by lighting up or moving. When the final symbol of an address is dialed, that chevron is said to "lock" and the wormhole opens (this terminology is arbitrary and often interchangeable, but preferred by the recurring character Walter Harriman). If the address is incorrect or does not correspond to an existing or otherwise functional Stargate, the last chevron will not lock, and all of the chevrons will disengage.
Addresses
The symbols used to comprise addresses are actually images of constellations. By identifying six constellations in space, a single point can be extrapolated that corresponds to the destination desiredStargate (1999). It is assumed by the show that this is enough to identify the position of any Stargate within a galaxy. The symbols dialed are often referred to as "coordinates", and are written as an ordered string; for example, this is the address used in the show for the planet Abydos: 
.
Eight-symbol addresses were introduced in |test2=|val2=show|then= (Stargate , opening up new plot lines by connecting Stargates to different galaxies. The eighth symbol acts as a type of "area code" | [Transcript]. Such connections, in comparison to seven symbol codes, required substantially more energy to complete a functional wormhole — much more than any standard dialing method can provide. Opening an intergalactic wormhole has been shown to require large amounts of power compared to a regular wormhole. This has been generated in a variety of ways in different episodes, although the main way is using a Zero Point Module (ZPM).
Nine-symbol addresses have never been dialed, and their purpose is unknown. The eighth and ninth chevrons are so rarely used that Stargates are often seen with those two chevrons embedded within the stone platform that holds the gate upright (see the image at the top of this article). This has often led to the misconception that a Stargate only has seven chevrons.
Dial-Home Device
There are a handful of methods used in the shows to dial a Stargate, and the most common is with the use of a Dial-Home Device. Almost always referred to as the "DHD" for short, it is depicted as a pedestal-shaped device with a round inclined control panel on top, consisting of two concentric circles of "keys", and a translucent red (Milky Way) or blue (Pegasus) hemisphere in the center; the keys represent the symbols on the rim of the Stargate. By pressing these keys a traveller builds an address. The central hemisphere serves as an "Enter" key to activate the Stargate once a destination has been dialed. In the Milky Way, the Dial-Home-Device contains 38 of the 39 symbols on the Stargate, meaning there is always a missing glyph on each DHD. This missing glyph however is not the point of origin for the planet. It has been confirmed that the missing glyph on numerous DHDs differs based on how each stargate is positioned on different planets. The glyph that is hidden under the pedestal of the stargate, unseen along with the two chevrons, cannot be dialed by the DHD. This states that only certain addresses can be reached in certain positions in the galaxy. The only way to intervene and reach all destinations in the Milky Way is to manually dial the gate, or use an alternative dialer, such as the one at the SGC.Andy Mikita, Stargate SG-1 Co-Producer
The show makes it clear that every Stargate originally had its own DHD, located directly in front of the gate and facing it. Over time, however, some DHDs have been damaged or lost. This has been the source of plot-difficulties for the protagonists on several occasions, as it is still possible to travel to a Stargate that lacks a DHD, meaning that dialing home again will be much more difficult, if not impossible. One of the primary functions of the MALP that precedes an SG team is to confirm the presence of a functioning DHD.
(However it should be noted that in Stargate - The Movie, the 7 symbol address for Abydos, leads to "...locked itself onto a point somewhere in the Kaliam Galaxy..." and a few moments later "...thats right Jackson, its on the other side of the known Universe...")
The Wormhole
Once an address is dialed, the gate is said to have created a "stable wormhole" between itself and the gate dialed. The creation process is depicted with great consistency, and hence has become one of the defining motifs of Stargate, at times being central in both the [SG-1] and [Atlantis] title sequences. It involves the generation of the "puddle of water" portal which lasts roughly 2 seconds, and is completed by the ejection of an unstable energy vortex called the "kawoosh", resembling a surge of water or quicksilver. The "kawoosh" is portrayed as a symbol of the Stargate's power, invariably causing characters to be awed, (for example) reflecting or imbuing the awe of the audience, and any matter contacted by the "kawoosh" effect is destroyed, save for the inevitable smoking shoes.
It is explained that the power for the wormhole is drawn solely from the point of origin (i.e. the dialing Stargate's power source) | [Transcript]. One of the most basic and repeated axioms of Wormhole Physics, the (fictionalised) field of study pioneered by the character Samantha Carter, is that unless an extraordinary amount of energy is being generated at either end, a wormhole can only be maintained for 38 minutes at a time.
The actual portal of a Stargate appears inside the inner ring when an address is correctly dialed. This has the appearance of a vertical puddle of water, called the "event horizon" by the show. In non-fictional parlance, an event horizon is the surface of a black hole through which one could pass into a theoretical wormhole; the magic of the Stargate technology is thus to form a spacetime distortion ("wormhole") without the gravitational effects of a black hole. The wavering undulations characteristic of water are explained as "fluctuations in the event horizon". This puddle may then be entered (usually accompanied by a water-like sound), and the traveller will emerge from a similar pool at the destination Stargate. The show makes it clear that transit is strictly one-way; an attempt to travel "backwards" causes the traveller to be destroyed. Additionally, the gate is invariably entered from the same side as the "kawoosh"; the show has not demonstrated what happens if a traveller enters from the wrong side.
The show is ambiguous in how it displays wormhole travel. Transit is sometimes almost instantaneous, and other times it may last up to 20 seconds. Most commonly the process lasts about 3 seconds. Passage through a Stargate is usually accompanied by a visual effect of shooting through a tunnel in space, and it is unclear whether this is meant to be a first person traveller's-eye-view representation, or just a visual aid. The former interpretation, though technically impossible (as a traveller's eyes are, along with the rest of his or her body, deconstructed into their individual atoms in transit), is often suggested by the show, as novice travellers often emerge from the gate trembling as if they've been on a "roller coaster ride", and the character Charles Kawalsky describes travel like "pull
Complexities of function
Both Stargate SG-1 and Stargate Atlantis introduce complicated facets of Stargates to contrive more interesting plotlines. Some of these have been developed into integral parts of how Stargates function.Matter transmission
When an object passes through the event horizon (the "puddle"), it is not immediately transferred to the destination Stargate, but rather the portion that has passed through is dematerialised and held in a "hyperspatial buffer". An object that hasn't completely passed through the event horizon may be pulled out again, and its atoms will rematerialise from the buffer as it is extracted. The gate does not begin transmitting an object until it has entirely passed through the event horizon. This ensures that only complete objects are transferred. Objects in the buffer remain in a state of suspension. This has been used to "store" people in medical need, but is a dangerous manoeuvre as when a Stargate is shut down everything still in the buffer "ceases to exist". The unstable vortex ("kawoosh") wipes the buffer clean to receive new information every time the gate activates. | [Transcript]
Several facets of the Stargate are necessary for it to function as a useful personnel transporter. Matter emerging from a Stargate retains any kinetic energy it had while entering, so a person running into one Stargate will hit the ground running upon emerging from another. Also, the transmitting Stargate does not allow the air molecules of the local atmosphere to pass through; doing so could be disastrous should a receiving gate be located in a vacuum. The show explains that the Stargate differentiates between objects attempting to pass through the event horizon and things that would naturally exert pressure, such as water, air, lava, etc. | [Transcript]
Gate obstruction
A wormhole is prevented from forming if a significant obstruction is present inside the Stargate's ring. Consequently, it is fairly common for Stargates to be semi- or permanently sealed by burying them, invalidating that Stargate address.
Another means of controlling travel through a Stargate is by placing a barrier a minuscule distance (less than two micrometres, in the case of the Earth's Iris) from the event horizon, which allows the wormhole to form but prevents the reconstitution of matter upon arrival through the gate. In other words, a connection can be made but any matter trying to exit the gate will not regain its original structure, and hence will be annihilated. The Iris on the Earth Stargate and the Shield on the Atlantis Stargate perform this function, and have been seen to be used as an effective defensive precaution, whilst still allowing radio communication through the open wormhole.
Iris-type barriers also suppress the kawoosh, but are not the only way to achieve this. Several aliens, including the Asgard and the Nox have demonstrated the ability to open a wormhole without the "kawoosh".
Power source
Power is always required to establish an outgoing wormhole, and is usually supplied by the DHD, but any Stargate can receive a wormhole whether it has a power supply or not; the dialing gate is the one that supplies power to both. In a few cases, Stargates have been dialed "manually" when more sophisticated means were not available. This was accomplished by providing sufficient raw power to the gate and then rotating the symbol ring by hand to lock each chevron. Power can be fed directly into the Naqahdah that comprises the gate; a lightning strike has been shown to be sufficient.The Stargate that establishes an outgoing wormhole determines how long the wormhole is held open, and can generally close the wormhole at will. There are inconsistencies in how this is portrayed in the series. Sometimes the gate appears to stay open without anything passing through it — other times it snaps closed as soon as the last person has emerged.
Secondary gates
Some planets are known to possess "secondary" or "backup" Stargates. | [Transcript] The second Stargate is normally inactive, with the primary Stargate (defined by the presence of a functioning Dial-Home Device) receiving all incoming wormholes. If a Stargate experiences a power surge while an outgoing wormhole is open, the other end of the wormhole has been observed to "jump" to the next closest gate in the network, most likely as a response to destabilisation of the wormhole and to prevent it from failing while in use. (The effect can also be used as a defensive measure, as seen in the episode "Prototype".) In the case of a planet with two gates, the closest is the inactive secondary gate. This scenario occured in the SG-1 first season, and resulted in a second gate being discovered on Earth, located beneath the ice of Antarctica.
The Antartic gate was later revealed to have originally been the primary stargate on Earth, built by the Ancients. It could in fact be the first stargate ever built. The stargate originally used in the SGC, found in Giza, was brought to Earth, by Ra, from another planet. Since Stargate addresses corespond to planetary locations and not individual gates, the new gate inherited the same address as the one in Antarctica. Because the Antactic gate had been abandoned millenia earlier by the Ancients and no longer had a functioning DHD, Ra's gate became the primary.
In the episode "Nemesis", SG1 transports the stargate from Stargate Command onto a crashing spaceship in order to escape. The gate is replaced at the SGC by the Antarctic gate. The original gate survives the crash, however, and the Russian military takes posession of it to conduct their own off-world travel. Because they were also in posession of a DHD (not found in the original Giza dig), which they activated and deactivated at pre-defined times, they were able to selectively become the primary gate. Using a strict schedule for returning teams, they were able to avoid detection by the US Air Force for some time.
In |test2=|val2=show|then=
from Stargate Command to travel to the Ancients' Lost City of Atlantis, located in the Pegasus Galaxy. They find that the Ancients seeded planets throughout the Pegasus galaxy with Stargates too, but used gates of a slightly different design. As these gates were built at a later date than the original Milky Way network, they may be of more advanced design, however at this point the differences appear mostly cosmetic.
The alternative Stargate design in the Pegasus galaxy is one of many things the producers of the shows employed to differentiate the sister shows SG-1 and Atlantis. Pegasus Stargates are designed with teal chevron lights instead of red ones, and the address symbols are groups of small blue lights (rather than embossed figures) that light up sequentially instead of rotating. Unlike the Milky Way gates, Pegasus gates are depicted with 36 symbols, but 7 symbols are still required to dial an interplanetary address — which totals 1,168,675,200 possible addresses (fewer than those in the Milky Way but adhering to the same constraints).
In a departure from the definitive "anywhere to anywhere" ethos of SG-1, the only Stargate in the Pegasus galaxy capable of reaching Stargates in the Milky Way is the one located at Atlantis. This is due to a special "control crystal" unique to the Atlantis DHD, without which a Pegasus Stargate cannot encode its eighth chevron. Unlike any other known gates, the Atlantis Gate can also identify the point of origin of the gate that tries to dial in, and can block an incoming wormhole.
Some Pegasus Stargates are orbital: they lead to open space, something never seen in the Milky Way. This is again a departure from the "personal travel" rather than "starship travel" ethos of SG-1, as these gates are used solely for space-faring vessels and never for humans. Orbital gates are depicted without a DHD, being powered by three power nodes spaced equally along the outer ring (see image). In the show, Puddle Jumper vessels have built-in DHDs to explain how a craft would return through an orbital gate.
One facet of the gate was, however, directly ported from SG-1 to Atlantis, and that was the idea of an "Iris" that allows wormholes to form but stops anything trying to emerge. The Atlantis Stargate has a "Shield" to this effect. As with SG-1, only the protagonists' gate has this capability, being the singular real defence they have against major attacks (thus allowing the shows to continue despite having insuperable enemies).
Symbols at Atlantis
The symbols depicted on the Atlantis gate again correspond to constellations, although in this case the constellations are fictional.
| Position | Glyph | Position | Glyph | Position | Glyph |
|---|---|---|---|---|---|
| 1 | 
| 13 | 
| 25 | 
|
| 2 | 
| 14 | 
| 26 | 
|
| 3 | 
| 15 | 
| 27 | 
|
| 4 | 
| 16 | 
| 28 | 
|
| 5 | 
| 17 | 
| 29 | 
|
| 6 | 
| 18 | 
| 30 | 
|
| 7 | 
| 19† | 
| 31 | 
|
| 8 | 
| 20 | 
| 32 | 
|
| 9 | 
| 21 | 
| 33 | 
|
| 10 | 
| 22 | 
| 34 | 
|
| 11 | 
| 23 | 
| 35 | 
|
| 12 | 
| 24 | 
| 36 | 
|
†As with SG-1, this origin symbol is unique to the Stargate at Atlantis, and other Stargates have their own unique origin symbols as well.
Ori \"Supergates\"
In the ninth season of Stargate SG-1, the Ori were introduced as a new main enemy for the show. They come from an entirely new galaxy, and are described as being masters of technology and Wormhole Physics equal to the original gate-builders. While it is not known what the Stargates in the Ori galaxy look like, their presence is implied by the fact that the Ori were able to send Priors (religious messengers) to the Milky Way through a Stargate. The only clue as to their design is that the transport rings used in their galaxy are white and pearly, suggesting by analogy that their Stargates are of this design as well.
On two occasions in the plot of Season 9 they attempted to create a massive Stargate, 300 to 400 metres in diameter, which was made of individual modules which were passed through a standard Stargate, presumably from the Ori galaxy. The modules formed the ring of what the character Samantha Carter called a "Supergate". These gates lack an inner track and are instead dialed by preprogrammed data crystals inserted into a panel on the side. Carter hypothesized that by tapping the power in a black hole, a Supergate connection could be permanent, though that has not been confirmed.
Making of the props
Two full Stargate props were originally built for the SG-1 pilot |test2=|val2=show|then= (Stargate , the second of which was reconstructed from the prop used in the film. They are made of steel and fiberglass, and are 22 feet in diameter. The second prop is less detailed, and is used for exterior scenes; in the pilot it was used solely on the planet Chulak. The primary one, however, is quite sophisticated. It is fully automated, and capable of rotating and emitting light. This is achieved by the use of a specially-designed 22-foot circular gear, which turns the inner ring on a precise pinion drive wheel, using an eight horsepower electric motor. The top seven chevrons emit laser pulses which are read by a sensor fed into a computer responsible for the gate's movement, which is consequently able to start and stop the rotation very quickly. This main prop is kept almost immovably at the permanent set of the SGC, at Bridge Studios, Vancouver.
There are further Stargate props which are no more than two-dimensional or semi-three-dimensional (jar-lid shaped) Stargates, being more lightweight and so easier to erect on location. These are always filmed front-on to preserve the illusion. If a shot involves the Iris, this is added in post-production, as the mechanics of it opening and closing would be very difficult to build. However, when a Stargate is filmed with just a closed Iris (i.e. without it moving), a tangible prop is inserted into place.
To cut down on costs, the opening of a Stargate is often just implied rather than shown, by a costless sound-effect followed by distinct lighting effects characteristic of light being shined through water (as the event horizon is depicted). The DVD commentary for Stargate SG-1 explains that these effects are produced by reflecting light off a large sheet of aluminium.
The Stargate itself is nearly always filmed against a blue or green backdrop, not only making it easier to paste the kawoosh imagery onto the scene, but also facilitating the superimposition of the "event horizon ripple effect", which is entirely computer-generated. On occasion, the Stargate itself is also completely swapped out for a computer generated model, usually in cases where it is being moved, or is depicted in space. Series producer Robert C. Cooper explained that it often costs a lot to erect a Stargate on location, and so in some cases offworld gates are also entirely a visual effect.
Other uses of the concept
The basic concept of a Stargate did not originate with the movie Stargate. Arthur C. Clarke first coined the term "Star Gate" in his novel ' (1968) as a fictional device allowing rapid travel between distant locations. Clarke’s "Star Gate" does not resemble the one described in this article; nevertheless, Stargate SG-1 paid homage to Clarke in the two episodes "2001" and "2010," which correspond to the first two books in his Space Odyssey series: ' and .Other writers have since used the name. Stephen Robinett's book "Stargate" (1976) revolves around the corporate side of building extra-dimensional and/or transportational Stargates. In the novel, the Stargate is given the name "Jenson Gate", after the fictional company which builds it. Authors Lynn Picknett and Clive Prince also write of "The Stargate Conspiracy: The Truth About Extraterrestrial Life and the Mysteries of Ancient Egypt". The book details an alternative theory which ingrains the term Stargate with Egypt's past: either the pyramid itself is a gateway to the stars (because of the shafts pointing to a star) or the building of Heaven on Earth based on geographical location of the great and outlying pyramids (see: Orion).
Common envisioning
There is a widespread conception within science fiction culture of what a "portal" should look like, with a large proportion of such devices bearing resemblances to a Stargate. The "ripple effect" is the most common part of this conception. Examples include the "warp gates" in Jak 3 which are rings containing a rippling blue substance used for transportation; a portal in ReBoot, created by the characters Megabyte and Dot displays a rippling "event horizon"; and the "Waygates" in Warcraft III which bear a shimmering portal. Also a Warp Gate a form of ancient Protoss psionic technology in the fictional StarCraft universe is very simlar. Protoss warriors created Warp Gates to travel great distances instantaneously, rather than using the slower process of space travel. The knowledge involved in their creation was lost, but on some planets like in Stargate, these gates still remain.
The Guardian of Forever, an artefact of the Star Trek universe, bears a strong resemblance. The device could open spacetime portals to any point in history on any world in the universe, and was ring-shaped with a watery "event horizon". It was first seen in the ' episode "The City on the Edge of Forever" (1967) and later in the ' episode "Yesteryear" (1974). Again in Star Trek, portals (with angular frames) and ripple effects are seen in the episode "To The Death".
In ' and the game ', the Borg have a device known as a Transwarp Conduit. The aperture of the conduit resembles the event horizon of a Stargate crossed with the wormhole effect created by the Stargate.
Common functions
The concept of "gates" that can span huge distances are used abundantly in science-fiction to cast protagonists into new territory. An early precursor to Stargate-like devices can be seen in the television series Buck Rogers in the 25th Century (1979-1981), where travel between stars was also accomplished by a Stargate network, similar to jumpgates in other series. Each Stargate carries a designation such as "Stargate 4". These Stargates however were only shown as a diamond-shaped quartet of stars that shimmered when a vessel was making transit.
Stargate-like devices are abundant in video games as they can be used to neatly split a game into levels. The video games Primal and Turok the Dinosaur Hunter feature gateways that allow instantaneous travel between locations to this effect, and in , a number of ring-shaped dimensional portals allow the main characters to travel between a "Light" and "Dark" version of a planet. More commonly, however, any game set in space will feature something like a Stargate purely to allow the game to function. In the game EVE Online, a large object called a Stargate lets you travel between solar systems, and in Homeworld 2, "Hyperspace Gates" serve as the centerpiece of one of the game's final missions; these are massive rings that create wormholes capable of transporting matter great distances.
Controversially, in the 1982 role-playing game Fringeworthy, travellers use a device that very much resembles a Stargate to travel to other dimensions. It was also built by an ancient race long gone. Some members of the gaming industry have claimed that the movie Stargate directly plagiarized from this game.
See also
- List of Technology in the Stargate universe
- List of Stargate planets, which lists all known gate addresses
- Stargate SG-1
- Stargate Atlantis
- List of Stargate SG-1 episodes
- List of Stargate Atlantis episodes
References
| Technology in the Stargate universe | [http://encycl.opentopia.com/ Edit] | |
| Tau'ri technology | GDO | IDC | Stargate Iris | Kull Disruptor | P90 | MALP | Naqahdah Generator F-302 | Prometheus (BC-303) | Daedalus (BC-304)-class Battlecruiser | 
|
| Goa'uld / Tok'ra technology | Al'kesh | Death Glider | Ha'tak Mothership | Hand Device | Healing Device | Intar | Sarcophagus | Staff Weapon | Tel'tak | TER | Tunnel Crystals | Zat | Zatarc detector | |
| Ancient technology | ATA Gene | Atlantis | Aurora-class Battleship | Dakara Weapon | DHD | DNA Resequencer Drone Weapon | Healing Device | Project Arcturus | Puddle Jumper | Repository of Knowledge Ring Transporter | Stargate | Time Dilation Device | Zero Point Module | |
| Other races' technology | Beliskner-class ship | Daniel Jackson-class ship | O'Neill-class ship | Thor's Hammer | Ion Cannon | Wraith Dart | Wraith Hive-Ship | Supergate | Ori Battlecruiser | |
| Technology by Race | All | Tau'ri | Ancient | Goa'uld | Tok'ra | Asgard | Tollan | Wraith | Ori | Other | |
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