Temporal core
A temporal core was a central component of vessels which were equipped with time travel technology.

29th century Federation timeships possessed temporal cores, which had to reach cascade potential before the generation of a temporal rift. In 1996, 20th century industrialist Henry Starling attempted to use the timeship Aeon to create a rift to the future, a process which required him to initiate a temporal inversion, upon which the temporal core was able to generate the rift. ()

The weapon ship invented by Krenim scientist Annorax was ed by a temporal core, which kept the vessel out of phase with normal spacetime, thereby protecting it from the changes to the timeline which it initiated.

In 2374, Captain Janeway piloted the  on a collision course with the weapon ship in a last-ditch effort to defeat Annorax. Upon the collision, the weapon ship's temporal core destabilized, initiating a temporal incursion within the ship itself, erasing it and all of its temporal incursions from history. ()

de:Temporaler Kern
Spacecraft components
Time travel technology