Aldebaran's system was inhabited by intelligent and non-intelligent lifeforms. These included Humans, mud leeches, serpents, and shellmouths. (TOS: "Amok Time", "The Deadly Years"; TNG: "Hide and Q"; ENT: "Anomaly")
In 2135, the HMS New Zealand was launched from Earth on a diplomatic mission to Aldebaran. It was listed on the chart Interstellar Expeditions to Sectors 184/02-185/38: Launched From Sol System, Earth Dates 2123-2190, which was seen on a screen in Jean-Luc Picard's ready room aboard the USS Enterprise-D. (TNG-R: "Up The Long Ladder", okudagram)
In 2293, the location of Aldebaran in the Milky Way Galaxy was labeled in the star chart The Explored Galaxy, which was seen in James T. Kirk's quarters aboard the USS Enterprise-A. (Star Trek VI: The Undiscovered Country, okudagram)
See also Edit
For the remastered episode "Up The Long Ladder", Aldebaran replaced Alderaan.
According to Star Trek: Star Charts (pg. 60), Aldebaran (Alpha Tauri) was a quadrinary star system. Aldebaran A was a K-class star with a magnitude of -1, which was a hundred times brighter than Sol. Aldebaran B and C were K-class stars and Aldebaran D was an M-class star.