Editing Stargate (device) (section)

===Addresses===
Each location in the ''Stargate'' universe has its own unique "address", which is a combination of six or more non-repeating symbols appearing on the dialing stargate.{{fact|date=September 2018}}<ref name="Avenger 2.0">{{cite episode|title=Avenger 2.0|episode-link=Avenger 2.0 (Stargate SG-1)|series=Stargate SG-1|series-link=Stargate SG-1|quote=seven symbols chosen from a pool of 38 non-repeating candidates, that's about 63 billion possible combinations.}}</ref> By "dialing" these symbols in the correct order, the traveler selects a three-dimensional destination.

<gallery mode="packed" heights="200px">
Image:Milky Way stargate.png|Schematic diagram of a Milky Way stargate with glyphs
Image:Pegasus stargate.png|Schematic diagram of a Pegasus stargate with glyphs
Image:Destiny stargate.png|Schematic diagram of Destiny's stargate with glyphs
</gallery>

[[Image:Stargatesg1diallingcomputer.jpg|thumb|right|The [[Stargate Command|SGC]]'s Dialing Computer compiling the address of the planet Abydos]]
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 (Stargate)|Abydos]]: <span style="white-space: nowrap;">[[Image:Stargate SG·1 symbol 27.svg|16px]] [[Image:Stargate SG·1 symbol 07.svg|16px]] [[Image:Stargate SG·1 symbol 15.svg|16px]] [[Image:Stargate SG·1 symbol 32.svg|16px]] [[Image:Stargate SG·1 symbol 12.svg|16px]] [[Image:Stargate SG·1 symbol 30.svg|16px]]</span> (corresponding to the constellations of [[Taurus (constellation)|Taurus]], [[Serpens Caput]], [[Capricornus]], [[Monoceros (constellation)|Monoceros]], [[Sagittarius (constellation)|Sagittarius]] and [[Orion (constellation)|Orion]]). As explained by Dr. Daniel Jackson in the movie, the Stargate requires seven correct symbols to connect to another Stargate. As shown in the picture opposite, the first six symbols act as coordinates, creating three intersecting lines, the destination. The Stargate uses the seventh symbol as the point of origin allowing one to plot a straight line course to the destination. With the stargates of the Milky Way, with 38 address symbols and one point of origin, there are 1,987,690,320 possible six symbol co-ordinates (leading to 38!/(38-6)!/8/6=41,410,215 addresses as the six symbol addresses are composed of three tuples that can be permuted in 6 ways and the two symbols within each tuple are invariant for 8 more permutations.). With the stargates of the Pegasus or Destiny, with 35 address symbols and one point of origin, there are only 1,168,675,200 possible six symbol coordinates.

[[Image:StargateCoordinates.svg|thumb|right|This diagram illustrates how Stargate symbols translate to physical coordinates.]]
By identifying six constellations in space, a single [[triangulation|sextangulation]] point can be interpolated that corresponds to the destination desired.<ref name="film">''[[Stargate (film)|Stargate]]'' (1999)</ref> As only a small portion of the possible combinations of Stargate symbols represent valid addresses, dialing the Gate at random is largely futile. In "[[Children of the Gods (Stargate SG-1)|Children of the Gods]]", SG-1 discovers a room on Abydos with a list of valid Stargate addresses and (luckily) a map that allows the SGC to compensate for thousands of years of [[stellar drift]]. In the series, the fictional planet Abydos could be dialed because it is relatively close to Earth, although in the film, Abydos was located in the fictional Kaliam Galaxy.<ref name="film" /> It was initially believed that the Goa'uld created the Stargates, but this was proven false in "The Torment of Tantalus" when the SGC discovered that Earth had accidentally dialled an address in 1945 that was not on the Abydos cartouche. Following this revelation, a larger list of Stargate addresses is provided by [[Jack O'Neill (Stargate)|Jack O'Neill]] in "[[The Fifth Race (Stargate SG-1)|The Fifth Race]]" from knowledge downloaded into his mind by a repository of the Ancients, allowing them to travel to worlds unknown to the Goa'uld.<ref name="The Fifth Race">{{cite episode|title=The Fifth Race|episode-link=The Fifth Race|series=Stargate SG-1|series-link=Stargate SG-1}}</ref> In "[[Rising (Stargate Atlantis)|Rising]]", a list of Stargate addresses in the Pegasus galaxy is found in the [[Atlantis (Stargate)|Atlantis]] database.<ref name=Rising>{{cite episode|title=Rising|episode-link=Rising (Stargate Atlantis)|series=Stargate Atlantis|series-link=Stargate Atlantis}}</ref> The SGC assigns designations to Stargate-accessible planets in the form P''xx-xxx'' or M''xx-xxx''. [[Samantha Carter]] explains in "[[The Broca Divide (Stargate SG-1)|The Broca Divide]]" that the designation "is based on a binary code the computer uses for extrapolation".

Eight-symbol addresses are introduced in "[[The Fifth Race (Stargate SG-1)|The Fifth Race]]", opening up new plot lines by connecting Stargates to different galaxies. The additional symbol acts as a type of "area code". Such connections, in comparison to seven symbol codes, require substantially more energy to complete a functional wormhole – much more than any standard dialing method can provide. In the first instance, opening an intergalactic wormhole is shown to exceed the total power generation capacity of the SGC at the time. O'Neill fashioned an additional power source using spare parts and the liquid naquadah power core of a staff weapon using the same enhanced knowledge that had allowed him to determine this address in the first place,<ref name="The Fifth Race" /> but this new power source only functioned twice and required repair work to operate the second time.<ref name="Point of View">{{cite episode|title=Point of View|episode-link=Point of View (Stargate SG-1)|series=Stargate SG-1|series-link=Stargate SG-1}}</ref> A fully charged [[Vacuum energy|Zero Point Module]] (ZPM) can provide enough power for regular travel between galaxies.<ref name="Rising"/><ref name="Letters from Pegasus">{{cite episode|title=Letters from Pegasus|episode-link=Letters from Pegasus (Stargate Atlantis)|series=Stargate Atlantis|series-link=Stargate Atlantis}}</ref><ref name="Camelot">{{cite episode|title=Camelot|episode-link=Camelot (Stargate SG-1)|series=Stargate SG-1|series-link=Stargate SG-1}}</ref> The 8th chevron is a key element in the [[Stargate Atlantis]] series, allowing travel to the [[Pegasus Galaxy (Stargate)|Pegasus Galaxy]]. For the stargates of the Milky Way, with 38 address symbols and one point of origin, there are 63,606,090,240 possible seven symbol coordinates. The stargates of the Pegasus or Destiny, with 35 address symbols and one point of origin, provide only 33,891,580,800 possible seven symbol coordinates.

''[[Stargate Universe]]'' introduces the concept of a nine-symbol address, the purpose of the ninth chevron never having been explored in the previous series.<ref>{{cite web|url=https://gateworld.net/news/2007/03/universe-deals-with-ninth-chevron/|title=Universe deals with ninth chevron|date=March 25, 2007|publisher=[[GateWorld]]|access-date=March 25, 2007}}</ref> The nine-symbol addresses act as codes to dial specific Stargates, with the only two known nine-symbol addresses used to dial from the [[Milky Way]] galaxy to ''Destiny'', a massive Ancient vessel that was part of a project to explore the universe, with the project being abandoned when they started researching into ascension among other things, and from ''Destiny'' to [[Earth]]. It is unknown if any other Stargates are reachable with a nine-symbol address, or if this is a feature unique to the Stargates on Destiny and Earth. Like eight-symbol addresses, the dialing of this address requires a significant amount of power, such that the scientists on Icarus Base had to tap into the planet's naqahdriah core. With the Stargates of the Milky Way, with 38 address symbols, there are 1,971,788,797,440 possible eight-symbol destinations. With the Stargates of the Pegasus or Destiny, with 35 address symbols, there are only 948,964,262,400 possible eight symbol destinations. Provided the ninth symbol is your point of origin. If the ninth symbol can also be added to the destination, even 59,153,663,923,200 combinations with a Milky Way stargate or 25,622,035,084,800 combinations with a Pegasus or Destiny Stargate are possible.