Tau Ceti

Tau Ceti was a star approximately 11.8 light years from Sol.

The Tau Ceti system was the site of the Tau Ceti Accords, a treaty between Vulcan and the Andorian Empire. (ENT episode: "Shadows of P'Jem")

In the mid-2260s, the USS Enterprise engaged and defeated a Romulan vessel near Tau Ceti. (TOS episode: "Whom Gods Destroy")

In the Mirror Universe, the Terran Empire lost twelve ships in a battle at Tau Ceti against alien rebels in 2154. This battle represented a major setback for the Empire. (ENT episode: "In a Mirror, Darkly, Part I")