Beta Quadrant
The Beta Quadrant was the common designation for one-quarter of the Milky Way Galaxy. It was adjacent to the Alpha and Delta Quadrants. One-quarter of the galactic core was located in this quadrant. (, Season 7 production art;   display graphics)

Part of the United Federation of Planets was located in the Beta Quadrant, along with the bulk of the Klingon and Romulan Empires, including their homeworlds of Qo'noS and Romulus. ( display graphic;  display graphic; ; ).

The Yattho, a species known for their precognitive abilities, were native to the Beta Quadrant. ()

History 
In 2259, the R'ongovian Protectorate held a small but strategically-important region of space in between Klingon and Romulan territory; the Federation sought an alliance with them to secure a safe path to the other side of the Beta Quadrant. ()

In 2293, the starship , commanded by Captain Hikaru Sulu, completed a three-year exploratory voyage in the Beta Quadrant which included cataloging gaseous anomalies. ()

In 2363, Captain Lisa Cusak and the crew of the  began an eight-year mission in the Beta Quadrant. Following this mission, the Olympia crashed on a planet in the Rutharian sector en route back to Federation space. While escorting a convoy to the Vegan system in 2374, the crew of the  made contact with Cusak in 2371 via a temporal anomaly. ()

In an alternate timeline, the  used a quantum slipstream drive to cross the Delta and Beta Quadrants, before crashing on a class L planet in the Takara sector, a few parsecs short of reaching the Alpha Quadrant. Also in this timeline, Starfleet Intelligence had salvaged a Borg temporal transmitter from the debris of a Borg cube in the Beta Quadrant. ()

A Borg scout ship, crewed by Axum and other liberated drones, was located in a remote sector of the Beta Quadrant patrolling the border of fluidic space. ()

When members of the Hierarchy captured Captain Janeway and forced The Doctor to obtain Voyagers warp core for them, he impersonated Janeway and told Commander Chakotay a cover story involving a fictitious R'Kaal Imperium which supposedly controlled "thousands of parsecs from here to the edge of the Beta Quadrant." ()

The Borg maintained at least one transwarp hub and thousands of exit apertures in the Beta Quadrant until 2378, when the entire transwarp network was destroyed by the . ()

In the 2380s, the Romulan supernova threatened the lives of billions of people in this quadrant within its burst radius. ()

Captain Riker – holoprogram 

In 2367, while exploring a cavern on Alpha Onias III, Commander William T. Riker was rendered unconscious by gases. While unconscious, neural scanners scanned Commander Riker's brain. The scanners used elements of Riker's reality and constructed a holoprogram with those elements interspersed throughout, so that it felt real to him. What Riker wanted, the scanners made possible.

In one of these simulations, the Axanar hosted a conference on Beta Quadrant exploration and Federation security that was held at the Deneva Special Congress on Interstellar Affairs. On Stardate 52384, Captain Riker, the commanding officer of the , was selected for recognition as the special Federation representative to this conference. In 2383, the quadrant was mentioned in Riker's service record that was on display in his quarters on the Enterprise-D. ( okudagram)

Governments 
 Acamarian Ruling Council 
 Klingon Empire
 R'ongovian Protectorate
 Romulan Free State
 Romulan Star Empire (until 2387)
 United Federation of Planets

Homeworlds 
 Acamar III
 Alpha Carinae II
 Ardana
 Argelius II
 Iconia
 
 Kolarus III
 Krios Prime
 Nausicaa
 Pahvo
 Qo'noS
 Ramatis III
 Remus
 Romulus
 Sigma Iotia II
 Tagus III
 Tiburon
 Valt Minor
 Vendor

Colonies and outposts 
 Ajilon Prime
 Amargosa observatory
 Archanis IV (Archanis IV Research Outpost)
 Beta Agni II
 Boreth
 Carraya IV
 Chaltok IV
 Corvan II
 Delta Outpost
 Delta Outpost 9
 Delta Outpost 10
 Delta Outpost 11
 Doctari Alpha (Doctari Alpha Research Outpost)
 Epsilon Outpost
 Epsilon Outpost 1
 Epsilon Outpost 2
 Epsilon Outpost 3
 Epsilon Outpost 4
 Epsilon Outpost 5
 Epsilon Outpost 6
 Epsilon Outpost 7
 Epsilon Outpost 8
 Epsilon Outpost 9
 Epsilon Outpost 10
 Epsilon Outpost 11
 Epsilon Outpost 12
 Epsilon Outpost 15
 Gamma Hydra IV
 H'atoria
 Jouret IV (New Providence colony)
 Khitomer (Khitomer Outpost)
 Korvat colony
 Lya IV
 M-Zed-5
 Narendra III
 Nivalla
 Nuzzo Station
 Okrand Colony
 Outpost 1
 Outpost 2
 Outpost 3
 Outpost 4
 Outpost 5
 Outpost 6
 Outpost 7
 Outpost 8
 Outpost 23
 Qu'Vat (Qu'Vat Colony)
 Regula I
 Relay Station 47
 Rura Penthe
 Science Station 0812
 Science Station Delta-05
 Septra
 Tarod IX
 Terralysium
 Turkana IV
 Vashti

Starbases 
 Deep Space 4
 Deep Space Station K-7
 Lya III starbase
 Starbase 18
 Starbase 23
 Starbase 24
 Starbase 36
 Starbase 39-Sierra
 Starbase 88
 Starbase 105
 Starbase 117
 Starbase 152
 Starbase 157
 Starbase 173
 Starbase 234
 Starbase 343

Spatial landmarks 
 'etnap Nebula
 Azure Nebula
 Baber Nebula
 Barnes Nebula
 'etnap Nebula
 Foster Nebula
 Frazee's Nova
 Friedlich Nebula
 Gullory Nebula
 Hodges Nebula
 Hromi Cluster
 Mutara Nebula
 Paulson Nebula
 Stevens Nebula
 Winter's Nova
 Wise Nebula

Appendices

See also
 Alpha Quadrant
 Gamma Quadrant
 Delta Quadrant

Related links
 Unnamed Alpha and Beta Quadrant planets
 Unnamed Alpha and Beta Quadrant starships

Background information

The Fen Domar, with whom Voyager was engaged in battle in an alternate timeline, may very likely be a Beta Quadrant civilization. This is based on the ship's close proximity to the quadrant's border in  and Admiral Kathryn Janeway's comments that the ship would have encountered them just a few years after the events of that episode.
 
According to Star Trek: Star Charts, the Beta Quadrant was home to the Vulcans, Andorians, Orions, Bolians, Son'a, Risians, Organians, Coridanite, Axanar, Nausicaans, Suliban, Gorn, and many other alien races.

External link

bg:Квадрант Бета
cs:Kvadrant Beta
de:Beta-Quadrant
es:Cuadrante Beta
fr:Quadrant Beta
ja:ベータ宇宙域
nl:Beta kwadrant
pl:Kwadrant Beta
sv:Betakvadranten
Regions
Cartography