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 Quadrant s . One - quarter of the galactic core was located in this quadrant . ( , " Season 7 " ; , " display graphics " ) Part of the Klingon Empire , including Qo ' noS , was located in the Beta Quadrant . ( , " display graphic " ; , " display graphic " ) The Romulan Star Empire claimed territory in the Beta Quadrant in the 24th century . ( , " display graphic " ) The Yattho , a species known for their precognitive abilities , were native to the Beta Quadrant . ( ) History . In 2293 , the starship , commanded by Captain Hikaru Sulu , completed a three - year exploratory voyage in the Beta Quadrant which included cataloging gas eous 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 " Voyager " s 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 . " ( ) Captain Riker - holoprogram . In 2367 , while exploring a cavern on Alpha Onias III , Commander William T . Riker was rendered unconscious by gas es . While unconscious , neural scanner s 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 " ) Appendices . Background information . For the remastered episode of " Future Imperfect " , the original text of Riker ' s service record was replaced . 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 , Earth marks the border between Alpha and Beta Quadrants . This notion seems to be supported by a graphic from " Year of Hell , Part I " and the display graphic on the PADD from . Dialogue in and however firmly establish that Earth is located on the Alpha Quadrant side of the border . According to " Star Trek Encyclopedia " , Federation , Klingon , and Romulan territories are situated both in the Alpha and Beta Quadrants . Again , in dialogue from " Star Trek : Voyager " and " Star Trek : Deep Space Nine " all three powers and governments in their vicinities have been exclusively referred to as Alpha Quadrant powers . A star chart graphic used in had the label Alpha Quadrant near Sector 01 ( Level 3 - B ) . According to " " , the Beta Quadrant was home to the Vulcan s , Andorian s , Orion s , Bolian s , Son ' a , Risian s , Organian s , Coridan , Axanar , Nausicaan s , Suliban , Gorn and many other alien races . According to the book , most of the early voyages of took place in the Beta Quadrant with only a few excursions in the Alpha Quadrant . The video game " Star Trek Online " is largely faithful to the " Star Charts " representation of the galaxy , with a few systems moved for gameplay considerations . The Alpha - Beta Quadrant border in these renditions is one sector " west " compared to the map as it appears in .