Until the system's star entered into an era of relative solar stability sometime before 2151, traveling to the system was all but impossible. (ENT: "Strange New World") The system is mentioned in the Handbook of Exobiology. In "Two Days and Two Nights" , the Enterprise, a NX-class starship, set a milestone in 2151 by becoming the first Earth ship to travel 90 light years from its homeworld. This system was visited before 2151. .