Gamma Trianguli
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Gamma Trianguli was the primary of the Gamma Trianguli system. This star was located in the Gamma Trianguli sector, which was a region of space in the Alpha Quadrant. The location of Gamma Trianguli in the Milky Way Galaxy was depicted on a Federation star chart in 2293. A planet in this system, Gamma Trianguli VI, was inhabited by the Vaalians, a pre-warp capable humanoid species. (TOS: "The Apple"; Star Trek VI: The Undiscovered Country, production art; ENT: "In a Mirror, Darkly, Part II", display graphic)
The atmosphere of the sixth planet, which was controlled by Vaal, filtered out any harmful effects from the star. The indigenous people of that planet believed that Vaal controlled their sun. (TOS: "The Apple")