Alpha Quadrant

The Alpha Quadrant was the common designation for one-quarter of the Milky Way Galaxy. It was adjacent to the Beta Quadrant and the Gamma Quadrant. One-quarter of the galactic core was located in this quadrant. (, Season 7 production art; display graphics) 
In late 24th century interstellar politics and diplomacy, the four great powers in the Alpha Quadrant were the , the Cardassian Union, the Klingon Empire, and Romulan Star Empire, though majority of the territory held by the latter two was found in the Beta Quadrant. Other powers at the time were divided into two groups. The mercantile powers, like the Ferengi Alliance, traded with the great powers. The isolationist powers, like the Breen Confederacy and the Tholian Assembly, defended their territory aggressively and would, on occasion, battle with other powers. (; ; display graphics) By the late 23rd century, the Alpha Quadrant still remained largely unexplored by the . ()
The Bajoran wormhole connected the Bajoran sector in the Alpha Quadrant to a point near the Idran system on the far side of the Gamma Quadrant near Dominion space. The use of this wormhole for exploration and trade by parties from the Alpha Quadrant incited hostility from the Dominion, culminating in the Dominion War. ()
The Borg maintained at least one transwarp hub and thousands of exit apertures in the Alpha Quadrant until 2378, when the entire transwarp network was destroyed by the . ()
In the alternate 2259, a section of this quadrant, from a galactic map, was in a collection of graphics and video media that were seen on a powerwall in the offices of Admirals and at Starfleet Headquarters. The map was being used primarily for charting activity on the Neutral Zone, Sectors 45 to 89. The three largest powers in this section – the Federation, the Klingon Empire, and the Orion Union – were labeled on this map. ()
In the mirror universe 2370, according to , the Klingon-Cardassian Alliance controlled "the entire quadrant". ()
In 2401, an unknown entity opened a transwarp conduit in the center of the quadrant, the creation of which threatened most of the sector it was in. A Borg faction led by Dr. Agnes Jurati -- who had merged with a Borg Queen from an alternate timeline in 2024 -- enlisted the Federation's help to protect the quadrant by combining the shields of a Starfleet armada led by the with that of the to successfully block the energy wave that was released. However, even the Borg with their collective knowledge didn't know who opened it and were granted provisional membership in the Federation to guard the conduit against whatever threat might come through. ()
== Major governments ==
* Breen Confederacy
* Cardassian Union 
* Ferengi Alliance
* Klingon Empire (from the 9th century)
* Romulan Star Empire (until 2387)
* Tholian Assembly
* United Federation of Planets (from 2161)
;Other timelines/realities
* Klingon-Cardassian Alliance (mirror universe)
* Terran Empire (mirror universe)
* Orion Union (alternate reality)
* Cardassian Empire (alternate timeline)
== Other societies ==
* Bajoran Republic
* Barzanian Planetary Republic
* Coalition of Madena
* Council of Nobles
* Eminian Union
* First Federation
* Gideon Council
* Orion Syndicate
* Kzinti government
* Talarian Republic
* The Patriarchy
* Vendikar High Council
== Homeworlds ==
* Akaali homeworld
* Algol I
* Alpha Majoris I
* Alshain IV
* Andoria
* Angel I
* Antos IV
* Arret
* Bajor
* Barzan II
* Benzar
* Betazed
* Bolarus IX
* Camus II
* Capella IV
* Cardassia Prime
* Coridan
* Cygnet XIV
* Delta IV
* Deneb IV
* Deneb V
* Draylax
* Earth (Sol III)
* (FGC-347601 III)
* Elas
* Eminiar VII
* Evora homeworld
* Fabrini homeworld
* Ferenginar
* Galen IV
* Gamma Trianguli VI
* 
* Golana
* 
* Janus VI
* Kiley 279
* Klaestron IV
* 
* Kzin
* Lactra VII
* Mizar II
* O'Ryan's Planet
* Omega Cygni
* Organia
* 
* Peliar Zel II
*Planet Q
* Pollux IV
* Phylos
* Rigel IV
* Rigel VII
* Risa
* Sarpeidon
* Scalos
* Setlik II
* Sigma Draconis III
* Sigma Draconis IV
* Sigma Draconis VI
* Tagra IV
* Talarian homeworld
* Talos IV
* Taurus II
* Tellar Prime
* Torothan homeworld
* 
* Troyius
* Tzenketh
* Valakis
* 
* Zalkon
* Zetar
== Colonies and Outposts ==
* Adarak Prime
* Aldebaran III
* (planet)
* AR-558
* Arawath Colony
* Archer IV 
* Atbar Prime
* Athos IV
* Atlec
* Avenal VII
* 
* Bajor VIII
* Barisa Prime
* Benecia (Benecia Colony)
* Bryma (Bryma Colony)
* Cardassia III
* Cardassia IV
* Cardassia V
* Ceti Alpha V
* Delta Outpost
** Delta Outpost 3
** Delta Outpost 4
** Delta Outpost 5
** Delta Outpost 6
** Delta Outpost 7
** Delta Outpost 8
* Deneva (Deneva colony)
* Draylon II
* Dreon VII
* Douglas Station
* Empok Nor
* Felton Prime
* Galen IV (Galen IV colony)
* Gamma 7 outpost
* Hakton VII
* Iridin
* Juhraya
* Korma
* L5 colony
* Lazon II (Lazon II labor camp)
* Loval
* Luna (Lunar colonies)
* Lya Station Alpha
* M'kemas III
* Mantilles
* Manzar
* Marcos XII
* Mars (Sol IV) (Martian colonies)
* Marva IV
* Memory Alpha
* 
* Mudd
* Omicron Ceti III
* Ophiucus III
* Outpost 47
* Outpost 61
* Orellius
* Orion Sector Tactical Command
* Peliar Zel Alpha
* Peliar Zel Beta
* Pentath III
* Planet Q
* Platonius
* Portas V
* Prophet's Landing
* Quatal Prime
* Rigel VII Lagrange colony
* Rigel X
* Salva II
* Setlik III
* Sheva II
* Solarion IV (Solarion IV colony)
* Solosos III
* Soltok IV
* Straleb
* Terra Nova
* Titan
* Tracken II
* Trelka V
* Umoth VIII
* Vega colony
* Vendikar
* Volan II
* Volan III
== Starbases ==
* Deep Space 3
* Deep Space 5
* Deep Space 9
* Eminiar VII Starbase
* Starbase 2
* Starbase 4
* Starbase 9
* Starbase 10
* Starbase 11
* Starbase 12
* Starbase 13
* Starbase 17
* Starbase 21
* Starbase 25
* Starbase 29
* Starbase 32
* Starbase 46
* Starbase 47
* Starbase 62
* Starbase 74
* Starbase 129
* Starbase 200
* Starbase 211
* Starbase 214
* Starbase 237
* Starbase 257
* Starbase 310
* Starbase 375
* Starbase 514
* Starbase 621
* Starbase 0834
* Starbase 4077
* Starbase G-6
== Spatial landmarks ==
* Arachnid Nebula
* Argolis Cluster
* Badlands
* Bajoran wormhole
* Barzan wormhole
* Beta Niobe Nebula
* Borias Cluster
* Briar Patch
* Helaspont Nebula
* Hugora Nebula
* McAllister C-5 Nebula
* Murasaki 312
* NGC 321
* Nebula C
* Rolor Nebula
* Talos star group
* Tibor Nebula
* Tong Beak Nebula
* Zeta Gelis star cluster
== Sectors == 
* Sector 001 (Sol sector, Terran sector)
* Sector 009
* Sector 441
* Sector 864
* Sector 9569 (Zalkon sector)
* Sector 25712
* Algira sector
* Andorian sector
* Argus sector
* Bajor sector
* Beloti sector
* Bolian sector
* Delta Vega sector
* Gamma Trianguli sector
* Orion sector
* Tellarite sector
* Tholian sector
* Vulcan sector
== Appendices ==
=== See also ===
* Beta Quadrant
* Gamma Quadrant
* Delta Quadrant
=== Related links ===
* Unnamed Alpha and Beta Quadrant planets
* Unnamed Alpha and Beta Quadrant starships
=== External link ===
*
=== Background information ===
In the script for , the Cardassian vole was described as being "the Alpha Quadrant's nominee for ugliest creature in the galaxy".
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