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$$ SGU 1x03 "Air, Part 3" $$
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[QUOTE]Originally posted by bX: [QB] The six symbols could define a vector (location, orientation, magnitude/relativistic velocity?) or perhaps a matrix describing the relative positions/orientations with the seventh defining the sector from which you are coming as a sort of checksum/punctuation. Someone should look that up... Oh, Hey... from [URL=http://en.wikipedia.org/wiki/Stargate]Wikipedia[/URL] [QUOTE]...The inner ring, which rotates within the outer, contains thirty-eight unique symbols representing star constellations and one symbol representing the planet or point of origin. Pairs of Stargates function by generating an artificial stable wormhole between them, allowing one-way travel through. The symbols on the inner ring of the Stargate correspond to constellations and serve to map out coordinates for various destination planets.[1][2]... ... [qb]Addresses[/qb] The symbols used to compose addresses are actually pictoral representations of star constellations. By identifying six constellations in space, a single point can be interpolated that corresponds to the destination desired.[22] 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", SG-1 discovers a cartouche on Abydos with a list of valid Stargate addresses, along with a map that allows the SGC to compensate for thousands of years of stellar drift. Another list of Stargate addresses is provided by Jack O'Neill in "The Fifth Race" from knowledge downloaded into his mind by a Repository of the Ancients. In "Rising", a list of Stargate addresses in the Pegasus galaxy is found in the Atlantis database. The SGC assigns designations to Stargate-accessible planets in the form Pxx-xxx (Mxx-xxx is more common in the Pegasus galaxy). Samantha Carter explains in "The Broca Divide" that the designation "is based on a binary code the computer uses for extrapolation". 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: (corresponding to the constellations of Taurus, Serpens Caput, Capricornus, Monoceros, Sagittarius and 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 co-ordinates, 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. Eight-symbol addresses are introduced in "The Fifth Race", opening up new plot lines by connecting Stargates to different galaxies. The additional symbol acts as a type of "area code".[4] 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 naqahdah power core of a staff weapon. A fully-charged Zero Point Module (ZPM) can provide enough power for regular travel between galaxies.[17][25][26] Stargate Universe introduces the concept of a nine-symbol address, the purpose of the ninth chevron never having been explored in the previous series.[27] The ninth symbol is suggested to be meant to lock on to moving Stargates, being a distance calculation along the "straight line" from the point of origin to destination (but more of a divide than the eighth chevron multiplier). Like eight-symbol addresses, the dialing this address requires a significant amount of power, such that the SGC had to tap into a planet's unstable radioactive core to meet the energy demand. The nine-symbol address is a specific combination used to dial the Destiny, a massive Ancient vessel that was part of a project to explore the universe, before the Ancients ascended.[28] [/QUOTE]At the extra-galactic distances we're talking about, using Earth as a Point of Origin (was this always the [URL=http://upload.wikimedia.org/wikipedia/commons/e/e2/MilkyWayGlyph01.png]Å[/URL]?) for any point in the Milky Way galaxy would likely constitute a relatively small margin of error. I didn't watch closely enough to see if the crew was dialing nine digits to get back to the ship... [/QB][/QUOTE]
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