Multiple realities
(covers information from several alternate timelines)

The Enterprise caught in a temporal wake

A temporal wake is an energetic phenomenon that can be created as a byproduct of a temporal vortex, insulating anything caught inside from an alteration of the timeline.

In 2373, a Borg sphere generated a temporal vortex to the year 2063, where they changed history by stopping Zefram Cochrane's first warp flight, and assimilating humanity. Having become caught in the vortex's wake, the USS Enterprise-E remained unaffected by the alteration to history, allowing the crew to follow the sphere through the vortex and able to not only restore but instigate the original timeline. (Star Trek: First Contact)

See also

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