Mirror Universe
(coexisting on another dimensional plane)

The Vintaak system's gas giant

The Vintaak system was a planetary system which possessed a single gas giant with several moons. In the mirror universe, this system was located deep in Tholian space.

A starship from the future of the prime universe was being held inside a moon of the system's gas giant. In 2155 this was discovered by Commander Jonathan Archer. After successfully staging a mutiny against Captain Forrest, Archer commandeered and forced the Terran battle cruiser ISS Enterprise to the Vintaak system in order to retrieve the captured starship, identified as the USS Defiant. Though Forrest eventually regained command of Enterprise, Archer had locked the helm controls on course for Vintaak. Forrest's attempts to change Enterprise's course ultimately proved futile.

When an away team under Archer's command beamed aboard the Defiant, Enterprise was discovered and captured in a Tholian web. In the subsequent Battle of Vintaak, some of the Enterprise's crew was able to abandon ship in escape pods, but the ship itself was destroyed with Forrest still on board. Archer captured the Defiant, damaged the drydock it was held in and took the Defiant to Earth. (ENT: "In a Mirror, Darkly")

It is unknown if this system is located inside Tholian space in the regular universe too, though it most likely at least exists there, as in mirror universe episodes it is always suggested that while political entities may be different, at least stellar cartography corresponds between both universes. The regular universe Vintaak system might be close to the region of space where the Defiant disappeared as it was close to where it reappeared in the mirror universe, though since there was a temporal shift perhaps a spacial shift also occurred.
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