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Up to date as of February 02, 2010

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The USS Enterprise approaches the galactic barrier in 2265.
The USS Enterprise departs the barrier (Where No Man Has Gone Before)

The galactic barrier is an energy field that surrounds the Milky Way Galaxy, delineating the border between the galactic material and the intergalactic void. The barrier appears as a purple/pink band of energy, and has been encountered several times by Earth and Starfleet vessels.



There are two contradictory accounts of who created the barrier.

By the Q

The barrier was created over 500,000 years ago by the Q Continuum as a means of containing 0 in the void between the Milky Way Galaxy and the Andromeda Galaxy, thus protecting the Milky Way from his evil influence. (TNG novel: Q-Strike)

By the Progenitors

It was speculated that the Galactic barrier was created by the Progenitors when they came under assault by the Totality. This led to the ancient race's downfall, but protected the younger Humanoid species that they had seeded on thousands of worlds. (TOS novel: Captain's Glory)


In December 2069, the Earth vessel SS Valiant was swept into the barrier after encountering a magnetic storm. Contact with the barrier left six crewmembers dead and chief engineer Geirrod Agnarsson was transformed into a psionic super-human after a disorientated Q possessed him. After Agnarsson killed several security guards, Captain Carlos Tarasco had no choice but to order the destruction of his own ship, after all crew had left via escape pods. Unfortunately, only 12 crew managed to survive the explosion and they soon began to develop psionic abilities due to their close proximity to the barrier. (TNG novels: The Valiant, Q-Squared; TOS episode: "Where No Man Has Gone Before")

In 2265, Admiral Saylor of Starbase 33 ordered the USS Enterprise to explore the edge of the galaxy, and even probe beyond the barrier. However, upon the Enterprise's arrival at the barrier, nine crewmembers were killed and two others began to change into super-human beings, as Q once again tried to reach out to their minds. (TOS episode: "Where No Man Has Gone Before" and TNG novel: Q-Squared)

When a party of Kelvans took control of the Enterprise in 2268 in order to begin the journey back to Kelva, they forced the Enterprise crew to take the ship out of the galaxy. The Enterprise was able to successfully cross the barrier this time, thanks to modifications the Kelvans forced the Enterprise crew to make.(TOS episode: "By Any Other Name")

In 2280, the Romulans established a secret base near the Galactic Barrier in order to study its effects. They had learnt that the barrier's power allowed it to give psychic abilities on humanoids. Romulan Star Empire scientists eventually discovered a means of leeching the barrier of its power and bestowing it on their test subjects. Their base of operations and their experiment was found out about by Vulcan spy Xon who's true nature was discovered which resulted in his capture. The USS Enterprise was involved in a rescue attempt and during the skirmish, the Romulan ship was lost in the barrier where its scientific discovery was lost tot he Empire. (TOS comic: "Blood Fever (comic)")

Sometime after the Borg had attacked El-Auria, Delcara acquired a small one-person ship and used it to cross the barrier. Delcara managed to locate the Planet Killer that had been left by the Preservers after their war with the Borg. By the mid-24th century technology had improved to the point that ships stood a much better chance of surviving an encounter with the barrier, but even then there was little interest in exploring space beyond the barrier as it would take centuries to cross the void between the Milky Way and Andromeda galaxies. (TNG novel: Vendetta)

Following a battle with Trelane in 2370, Q was sent back to the initial creation of the barrier, and was turned into a non-corporeal entity by Trelane. Being in a deeply disorientated state, Q became trapped inside the barrier until the 23rd century. (TNG novel: Q-Squared)

In 2381, the Caeliar tanwa-seynorral Ordemo Nordal told Troi that they chose our galaxy for their research as it had sheltering effects no other Galaxy possessed. When asked to elaborate, he referenced the galatic barrier that surrounds the Milky Way, cryptically stating that beyond our galaxy, "there are many powers of varying degrees of malevolence. The only sanctuary we've found from their malicious interferences has been here, within the protective embrace of the galactic barrier." (ST - Destiny novel: Mere Mortals)

The barrier still existed in the late 26th century, as Prefect Tamar's ship was badly damaged while crossing it. (TOS short story: "Gone Native")

External Links

This article uses material from the "Galactic barrier" article on the Memory-beta wiki at Wikia and is licensed under the Creative Commons Attribution-Share Alike License.

ST Expanded

Up to date as of February 07, 2010

The Star Trek Expanded Universe Database is for fanon and related content. See for the canon Star Trek wiki.

USS Enterprise approaches the galactic barrier

The Galactic barrier is a mysterious energy field of unknown origin, surrounding the Milky Way Galaxy (or at least the near side of it). It manifests as as a pinkish-purple band of energy, which has been encountered by numerous Earth and Starfleet vessels. One of the closest planets to the barrier is Delta Vega.

It was first discovered by humans circa 2065, when the SS Valiant breached the barrier, and was subsequently destroyed.

Two centuries later, in 2265, the USS Enterprise discovered the Valiant's recorder-marker and learned that the Valiant's captain had destroyed the ship himself, to prevent a mutated crewmember from escaping.

The Enterprise breached the barrier herself, resulting in crewmen Gary Mitchell and Elizabeth Dehner gaining "god-like" powers. Mitchell would have destroyed the ship and threatened the entire galaxy, had he not been killed by his best friend, Captain James T. Kirk, with Dehner's help. (TOS: "Where No Man Has Gone Before")

In 2268, the Enterprise twice encountered the barrier; once when hijacked by the Kelvans, and again when engineer Lawrence Marvick was driven mad by the sight of Medusan Ambassador Kollos. (TOS: "By Any Other Name", "Is There In Truth No Beauty?")

Over the next century, other Starfleet vessels would also encounter the barrier, including the USS Stargazer in 2333 and the USS Enterprise-E in 2374. (TNG novels: The Valiant, The Q Continuum)

While on a survey of the galactic rim in 2383, the USS Pendragon was diverted to Delta Vega to recover the bodies of Mitchell and Dehner. Exposure to the residual energy in the bodies altered Lt. Commander Ben Bartholomew, and ultimately resulted in the Pendragon breaching the galactic barrier. (Star Trek: Pendragon: "Whispers As Loud As Thunder")

The barrier was once again encountered in 2384, this time by the Phoenix-X, on a dual mission to complete the X-Project testing and use it to travel to the Andromeda galaxy. Upon a rough crossing of the barrier, through the use of ultra-transwarp, the crew were momentarily met with the being 0. Luckily, Q had been traveling aboard the Phoenix-X and was able to deal with the other omnipotent being. (Star Trek: Phoenix-X: "Forbidden Crossing, Parts II & III")

Three years later, in 2387, the USS Pioneer came into contact with the barrier while on a mission to study the phenomenon. En-route the ship was stolen by Gary Mitchell and his race of Gods who had developed on Delta Vega. (Star Trek: Pioneer (PNR): "In Thy Image").

In this episode, the explanation for the rapid journey from Federation space to the edge of the galaxy is explained by travelling through "Warp Region 6".


External links

This article uses material from the "Galactic barrier" article on the ST Expanded wiki at Wikia and is licensed under the Creative Commons Attribution-Share Alike License.


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