Multiple realities
(covers information from several alternate timelines)

The following are unnamed Alpha and Beta Quadrant star systems.

2466 PM solar system

This uncharted solar system, located at 2466 PM, contained a planet where the Metrons forced Kirk to fight a Gorn captain. (TOS: "Arena")

Akaali system

Located seventy-eight light years from Earth, this inhabited system was in the general vicinity of a cluster of three neutron stars and a J'ral class supernova remnant. The Akaali homeworld was located in this system. In 2151, Enterprise NX-01 defeated a Malurian vesssel in this system. (ENT: "Civilization")

According to the Star Trek: Star Charts (p. 54, 60) and the Stellar Cartography: The Starfleet Reference Library ("Beta Quadrant: Local Space Extract"), the Akaali (Omega Sagittarii) system was located in the Beta Quadrant. The primary was a G-class star.

Amargosa system

This system accompanied the star Amargosa and included the Amargosa observatory, a space-based Federation facility. In 2371 the facility was attacked by Romulans, sparking concern of a new Romulan threat in the sector. At the time the Enterprise detected no ships in the system, though a cloaked Klingon ship was present. Shortly thereafter, a trilithium weapon launched into Amargosa by the rogue scientist Tolian Soran triggered the star to collapse, producing a level twelve shock wave expected to destroy everything in the system. (Star Trek Generations)

Dialogue from the movie suggested it was in the same sector as the Veridian system.

Argolis Cluster system

This system within the Argolis Cluster was charted by the USS Enterprise-D in 2368. During the mission, the Enterprise picked up a transmission from a crashed Borg scout ship on a small moon orbiting the fourth planet. The Federation starship rescued the Borg drone Hugh from the wreckage. (TNG: "I Borg")

Arret system

The system was located hundreds of light years past the limits of Federation exploration in 2268. That same year, the USS Enterprise was directed to the planet Arret in this system by the thought energy of Sargon. (TOS: "Return to Tomorrow")

Arret (negative) system

This reverse negative antimatter universe star system was in the same galactic position as the Sol system in the forward positive matter universe. The inhabited planet Arret was located in this system. In the mid-23rd century, Karl Four pointed out the location of his home system on a galactic map to Robert April, James T. Kirk, and Spock. (TAS: "The Counter-Clock Incident")

Azati Prime system

Core of star system

This unnamed star system containing the planet Azati Prime was a Delphic Expanse system. Its primary was a red giant located at coordinates 1127.4 by 4052 by 3901.1. The system also contained at least two more planets and at least two moons, as well as at least one planetoid.

As of 2154 considerable activity existed around two of the inner planets, numerous ships, all Xindi. One of these inner planets was Azati Prime. Further out the system also contained a planetoid, with a moon that contained a monitoring station. The station was one of several lunar outposts in the system, and was destroyed in early 2154.

A large array of thousands of artificial satellites that created a detection grid and security net was deployed in the system, protecting Azati Prime. It was extremely sensitive and had no weaknesses. If one of the satellites was destroyed or disabled, the other satellites filled up the gap. (ENT: "Azati Prime")

The exact layout of the system wasn't explained. The schematic seen on this page shows the detection grid, which apparently encompassed four planets. However, the planetoid Enterprise hid behind was apparently outside of the grid, so the total number of planets is unknown. Furthermore, ships traversing the grid were seen with Azati Prime very near in the background, suggesting that in spite of its name it was the fourth rather then first of the planets in the schematic. One solution might be that the graphic does not depict the system but Azati Prime and four moons, surrounded by a grid encompassing only them. However, in that case it seems peculiar that a predominantly blue world would be shown in red. A further peculiarity in the episode is the very sudden appearance of a moon in a way that suggests the writers might have interchanged the words "planetoid" and "moon".

Ba'ku system

This Alpha Quadrant system was located in the Briar Patch, a region of space in Sector 441. The system had one class M planet – Ba'ku – which was colonized by the Ba'ku. According to Ru'afo, the injector assembly, if fired at the planet Ba'ku, would leave all life in the system dead or dying in six hours. This system was located in Federation space. (Star Trek: Insurrection)

Ba'ku home system

This system was the home system of a group of settlers who founded a colony on the Ba'ku planet in 2066. This system's civilization had technology which could destroy all life and the settlers feared their species was on the verge of self-annihilation. (Star Trek: Insurrection)

Barzan system

This Alpha Quadrant system was home to the Barzan species, who inhabited the system's second planet, Barzan II. The system was also home to multiple moons, of which Amma and Tolpra were said to be the "most beautiful". (DIS: "Die Trying")

For a time, the system was a fixed endpoint for the Barzan wormhole until 2373, when it was accidentally destabilized by Dr. Arridor and Kol. (TNG: "The Price"; VOY: "False Profits").



Battle Group Omega rendezvous

Battle Group Omega rendezvous point

This system was located in Sector 1045. In 2379, Star Fleet Battle Group Omega planned to rendezvous in this system to combat the Scimitar, though ultimately the Scimitar was destroyed by the USS Enterprise-E in the Bassen Rift. (Star Trek Nemesis)

Binary system

Enterprise in a binary star system

This binary star system was explored by Enterprise NX-01 in September 2152. Captain Jonathan Archer and Commander Tucker prepared Shuttlepod 1 to visit the surface of an uninhabited planet but were forced to leave when a neutronic wavefront approached. (ENT: "The Catwalk")

Binary system (2368)

This binary system was the "most unusual thing" in a routine mapping of a sector by the USS Enterprise-D in 2368. (TNG: "Violations")

This system was only mentioned in dialogue.

Binary system at edge of Federation space

Just before the Federation-Klingon War of 2256, this system was at the most remote borders of Federation space, though still part of its territory. According to the Klingon Empire however, it was too close to Klingon territory. Around its two suns, an accretion disk containing ice, dust, and gasses collided to form planets future generations would call home. It was described as "beautiful". It was located six light years away from Gamma Hydra and three from Eagle-12, which were both Federation positions.

However, the disk also contained high levels of radiation, brisk temperatures of −260 degrees Celsius, and the binaries were kicking off serious QE's up and down the spectrum.

It hosted an Starfleet interstellar relay, which in 2256 was found destroyed. The USS Shenzhou was ordered to investigate, and found the Beacon of Kahless at the heart of a Klingon trap. The resulting battle, known as the Battle of the Binary Stars, set off the Federation-Klingon War of 2256. (DIS: "The Vulcan Hello")

Binary system inside a Tyken's Rift

This uncharted binary star system was located inside a Tyken's Rift. In 2367, a mysterious alien became trapped in the rift and with the help of the USS Enterprise-D managed to escaped. The stars of this system were described by Deanna Troi as being "twins". (TNG: "Night Terrors")

Bre'el IV system

This system contained the inhabited planet Bre'el IV. In 2366, a large celestial object passed at near right angles to the plane of this system, resulting in Bre'el IV's moon entering into a deteriorating orbit. The moon was restored to its place by Q. (TNG: "Deja Q")

The object was not identified. Q theorized that it was a black hole.

Cold Station 12 system

Cold Station 12

This system contained a large asteroid field. One asteroid was the location of Cold Station 12, a facility operated by the Interspecies Medical Exchange. During the Augment Crisis in 2154, this asteroid field was the site of a battle between Enterprise NX-01 and a Klingon Bird-of-Prey hijacked by Arik Soong's Augments. (ENT: "Cold Station 12")

Cytherian homeworld system

Cytherian homeworld

This system, identified by Data as a planetary cluster, was located 30,000 light years from the Argus Array. Located near the galactic center, the system contained the homeworld of the Cytherians. In 2367, this system was visited by the USS Enterprise-D. (TNG: "The Nth Degree")

Delta Theta III system

This star system contained the inhabited planet Delta Theta III, orbiting the system's sole star.

In the 23rd century, this system was explored by a scouting mission, which discovered possible evidence of the native civiilization on Delta Theta III. First contact with the natives was made by a contact team from the USS Enterprise in 2270. After learning that the world was protected by an alien intelligence, the planet was quarantined. (TAS: "Bem")

Earth Two system

This inhabited star system was located hundreds of light years from Earth, in the distant reaches of the Milky Way Galaxy. The third planet of the system, Earth Two, was a duplicate of Earth. (TOS: "Miri")

Ekos and Zeon system

This star system was home to two M class planets inhabited by humanoids. Ekos, home of the Ekosians, occupied an orbit inward from its' sister planet, Zeon, home to the Zeons.

Following the elimination of the Nazi regime on Ekos, along with the predicted cooperation with their Zeon neighbors, Spock recommended that "With the union of [these] two cultures, this system would make a fine addition to the Federation." (TOS: "Patterns of Force")

According to StarTrek.com, the system was named M34 Alpha; however, according to Star Trek Encyclopedia (4th ed., vol. 2, p. 513), the system was named M43 Alpha.

Eminiar system

The NGC 321 star cluster containing the star system

This star system was located within the star cluster NGC 321. The system's primary was named Eminiar. A planet in this system, Eminiar VII, was inhabited by the Eminians. This species had colonized the third planet in this system, Vendikar, sometime prior to the late 18th century. (TOS: "A Taste of Armageddon")

Excalbia's solar system

This solar system contained the planet Excalbia. When the crew of the USS Enterprise was about to bear witness to the conflict the Excalbians set up to demonstrate the differences between "good" and "evil", their representative Yarnek announced: "We welcome the vessel Enterprise to our solar system and to our spectacle." (TOS: "The Savage Curtain")

Exo III system

Exo III was located in a system of which the sun had been fading for half a million years as of the 23rd century. (TOS: "What Are Little Girls Made Of?")

Gosis' species star system

Gosis' species system was a system with only one habitable planet.

When Enterprise NX-01 visited his planet in 2152, Temec reasoned that the Humans must have come from an alien system, since "none of the other planets are capable of supporting life." (ENT: "The Communicator")

Iconian influenced systems

Three Beta Quadrant systems, located in or near the Romulan Neutral Zone and in the same sector, demonstrated similar cultural traits, indicating they were influenced by the Iconians. (TNG: "Contagion")

Iotian system

Described by Captain James T. Kirk as being on "...the outer reaches of the galaxy", this star system had at least two planets. The second planet, Sigma Iotia II, was the homeworld of the Iotians. (TOS: "A Piece of the Action")

According to non-canon sources, this system orbits the star Sigma Iotia (β).

J'naii system

This star system harbored the planet J'naii, homeworld of the J'naii. It also harbored a null space pocket, a fact which was only discovered in 2368. (TNG: "The Outcast")

Kavis Alpha sector binary system

This unnamed binary system consisted of a neutron star, a red giant, and Kavis Alpha IV. The neutron star went through a cycle of sucking matter from the nearby red giant, then explosively expelling the matter into space, every 196 years.

In 2366, Doctor Paul Stubbs recorded this historic event, from the Enterprise-D, using a customized probe known as "The Egg." (TNG: "Evolution")

Lazarus' planet system

This star system was visited by the USS Enterprise in 2267. As the starship was completing its survey of an iron-silica planet, the whole system experienced a disruption of its magnetic field. (TOS: "The Alternative Factor")

Malcor III system

This star system, containing the inhabited planet Malcor III, was a single star system with six planets. The nearest system was the Garth system and Earth was over 2,000 light years away. (TNG: "First Contact")

Mixtus system

Mixtus III and its seven moons

This unnamed system contained the inhabited planets Mixtus II and Mixtus III, and was home to the Mixtus inhabitants. (LD: "Cupid's Errant Arrow")

New Berlin Colony system

This unnamed system was administered by the Federation New Berlin Colony. In 2369, the colony sent out a distress call fearing a Borg incursion, while all that had happened was that a Ferengi trader had entered their system. (TNG: "Descent")

Paxan system

This unnamed system was located in a pocket of the Ngame Nebula. It contained a T-Tauri type star and a single class M planet which was the Paxan homeworld. The Enterprise-D went through this system to investigate it and, running into the Paxans, agreed to erase knowledge of the area from their computer and themselves. Believing they passed through an unstable wormhole, they decided to continue on and sent Starfleet a hazard advisory about the wormhole. (TNG: "Clues")

Pyris VII system

This unnamed system contained the plant Pyris VII. Before the USS Enterprise visited Pyris VII in 2267, several mapping expeditions had been sent by the Federation to this system. These expeditions did not find lifeforms on the seventh planet. (TOS: "Catspaw")

Rock creature planet system

This uncharted system was visited by the USS Enterprise in 2269. It was a binary star system with a lone Class M planet, an unique find. (TAS: "Mudd's Passion")

Romulan-held system

This system, uncharted according to Starfleet, had several planets including one that was Minshara class. The system turned out to be claimed and defended by the Romulan Star Empire, which did not tolerate others entering it. (ENT: "Minefield")

Romulan Neutral Zone solar systems

In 2365, the USS Yamato eluded a Romulan cruiser by playing hide and seek in these solar systems located in the Romulan Neutral Zone. (TNG: "Contagion")

These solar systems were only mentioned in dialogue.

Starbase 234 system

This system, located in the Beta Quadrant, was the location for Starbase 234.

In 2368, Picard's blockade fleet assembled in this system. Later, after clearing the system, the fleet went to warp. (TNG: "Redemption II")

Star systems visited by Ullians

These seven star systems, home to ten planets, were visited by the Ullian telepathic historians in the 2360s. They were collecting a library of memories from the inhabitants. (TNG: "Violations")

These star systems were only mentioned in dialogue.

Suliban hiding system

The stars of the system

This binary star system was located two and a half light years from Paraagan II. It contained at least two planets, and at least two moons.

In 2152, a Suliban stealth cruiser hid on the inner moon of the second planet orbiting the smaller star in the system. Enterprise NX-01 disabled the Suliban cruiser in this system and stole its data disks to prove it wasn't responsible for the destruction of the Paraagan mining colony. (ENT: "Shockwave")

System with Kuiper belt

System with a Kuiper belt

In 2375, Odo and a defective Weyoun clone managed to evade capture by Jem'Hadar by hiding in this system containing a Kuiper belt. (DS9: "Treachery, Faith and the Great River")

T-Tauri systems near wormholes

These thirty-nine T-Tauri systems were located near small and unstable wormholes. The first of these wormholes was mapped in the 23rd century. (TNG: "Clues")

These systems were only mentioned in dialogue.


Taurus II system

This inhabited system was located in the Murasaki 312 quasar. It was one of four systems in the same sector as the quasar, and was three light days away from Makus III.

It had one planet capable of supporting life, known as Taurus II. This system was unexplored by the Federation as of 2267, when the USS Enterprise recued the crew of one of its shuttles. (TOS: "The Galileo Seven")

Terra Nova system

The system of Terra Nova

A display graphic demonstrated Terra Nova to be part of a solar system containing several other planets. (ENT: "Terra Nova")

Tholian system

This system was home to the xenophobic Tholians. When Enterprise NX-01 encountered a Tholian vessel in 2152, T'Pol remarked that it was unusual for Tholians to travel that far from their system. (ENT: "Future Tense")

The Tholian homeworld, presumably located in this system, might be called Tholia.


Trinary star system

A trinary system

This unidentified trinary star system was encountered by the Enterprise NX-01 in 2152. It contained a black hole. (ENT: "Singularity")

Ventax II system

This system was the home system for Ventax II.

In 2367, the USS Enterprise-D conducted a high-resolution scan of this system as they searched for Ardra's starship. (TNG: "Devil's Due")

War games simulation system

In a holographically-simulated tactical scenario played out on USS Voyager in 2371, a red giant system 3.7 light years away, with eight planets, none of them M class, played a minor role. (VOY: "Learning Curve")

The simulation was not explicitly said to be set in the Alpha or Beta quadrant, however the inclusion of Ferengi and Romulan vessels makes this probable.

Xindi solar system

The remains of Xindus

This system was located in the Delphic Expanse. It contained a yellow-orange star and a single planet, Xindus, which was destroyed in the 2030s and left behind an asteroid field nearly eighty million kilometers long. The system was abandoned by the time Enterprise NX-01 visited it in 2153. (ENT: "The Xindi")

Yadalla Prime system

The Yadalla Prime system was an inhabited planetary system in Sector 2158, a region of space in the Beta Quadrant. The system consisted of a primary and three planets, including Yadalla Prime. It was located near the Romulan Neutral Zone.

In the 2360s, Yadalla Prime was home to a Starfleet base. (TNG: "Gambit, Part I", "Gambit, Part II")

Information on this system was from an Okudagram seen on the bridge of the USS Enterprise-D. This graphic was put up for auction in 2018. [1]

Yonada system

In 2268, the USS Enterprise discovered the asteroid ship Yonada in this solar system. (TOS: "For the World is Hollow and I Have Touched the Sky")

Zalkonian star system

The Zalkonian homeworld Zalkon was located in this star system. This system was within Sector 9569. In 2366, the USS Enterprise-D was on a course to this system, ferrying the Zalkonian "John Doe" to his home, when they were intercepted by a Zalkonian warship commanded by Sunad. (TNG: "Transfigurations")

Zeta Gelis star cluster star system

This unknown star system in the Zeta Gelis star cluster was charted by the USS Enterprise-D in 2366. During its assignment, the Enterprise-D discovered a Zalkonian escape pod on the surface of one of the system's planets. (TNG: "Transfigurations")

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