Groombridge 34 was a star system consisting of binary companion stars, Groombridge 34 A and Groombridge 34 B. It was located near Sol, Alpha Centauri, Tau Ceti, and Sirius. It was located in the Alpha Quadrant.
On several occasions in 2364, viewscreen readouts aboard the USS Enterprise-D showed the location of the A and B Groombridge 34 stars, in the form of a star chart from the Enterprise-D library computer. The stars names were abbreviated in the chart as GRB 34 A and B. (TNG: "The Naked Now", "The Last Outpost", "Conspiracy")