The Beta Geminorum system was a planetary system in the Alpha Quadrant. Its primary Beta Geminorum was orbited by at least five planets. The closest starbase was Starbase 12. (TOS: "Who Mourns for Adonais?"; DIS: "Magic to Make the Sanest Man Go Mad")

In 2257, during the first Federation-Klingon War, this system was occupied by the Klingons. (DIS: "The War Without, The War Within")

When surveying Pollux V and the rest of the Beta Geminorum system in 2267, the USS Enterprise detected a statistically unexpected absence of intelligent life at first. However, the ships's crew soon encountered Apollo, the last member of his species of ancient intelligent humanoids, on Pollux IV. (TOS: "Who Mourns for Adonais?")

In 2293, the location of Beta Geminorum in the Milky Way Galaxy was labeled in a star chart that was in Captain James T. Kirk's quarters aboard the USS Enterprise-A. (Star Trek VI: The Undiscovered Country, okudagram)

In 2371, the location of Beta Geminorum was labeled on a star chart Data and Picard were studying in stellar cartography on the USS Enterprise-D. (Star Trek Generations, okudagram)

Michael Okuda, who created the star chart "The Explored Galaxy", depicted Beta Geminorum and Pollux as two distinct stars, even though they were established to be synonymous in "Who Mourns for Adonais?".
Beta Geminorum, the primary of the Beta Geminorum system, was located in the Alpha Quadrant on a star chart seen in the Star Trek: Discovery episode "Magic to Make the Sanest Man Go Mad".
Pollux V was also featured in the video game Star Trek: 25th Anniversary.
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