The Tanuga system was an inhabited star system. The planet Tanuga IV was the homeworld for the Tanugans, a highly advanced humanoid species.
The USS Enterprise-D visited the Tanuga system in 2366 to deliver dicosilium to the Tanugan scientist Doctor Nel Apgar. (TNG: "A Matter of Perspective")
"TAN-ooh-guh" was the pronunciation for this system's name from the script pronunciation guide.