Alternate realities

This is a list of alternate timelines, universes and other types of realities.


 * Canon base reference : The most commonly encountered timeline is known as the "canon" universe. The history of this reality includes the known history of Earth, the Federation, with events known until around the Terran year 2379. While generally continuous in and of itself, there are numerous time-travel scenarios and other reality-distorting events that have created discontinuities that, in some respects, could be considered parallel universes or timelines.
 * Mirror universes : This is a group of realities where the Federation has evolved into a Terran Empire. Numerous alternate universes are known to branch from this reality.