The Triangulum Galaxy (or M33) was the next closest spiral galaxy to the Milky Way beyond the Andromeda Galaxy, located some three million light years from the Alpha Quadrant at its closest point.
In 2364, the USS Enterprise-D was hurled to the far side of the Triangulum Galaxy by the Traveler during warp field tests; after reversing engines, the ship emerged in the vicinity of a giant protostar in the process of formation.
Calculations indicated that a return trip to the Milky Way from Triangulum, using maximum warp speed, would take over three hundred years. A subspace radio message, sent from the Triangulum Galaxy to Starfleet Command, was estimated to have a travel time of fifty-one years set to arrive in the year 2415.
An image of the Triangulum Galaxy, taken from Earth, was on display in astrometrics aboard the USS Voyager in the years 2375 and 2376.
