A burnt-out star which the terraformer Gideon Seyetik successfully reignites in 2370, at the cost of his own life, in the episode Second Sight.
Epsilon 119 is the target of the most ambitious project of Professor Gideon Seyetik, a celebrated and immensely self-satisfied terraformer. He arrives at Deep Space 9 aboard the USS Prometheus, intending to bring the dead star back to life by firing a shuttlepod loaded with protomatter into it.
While the mission is prepared, Sisko falls for a mysterious woman named Fenna, who turns out to be a psychic projection of Seyetik's unhappy wife Nidell. Her species mates for life, and the projections are draining her strength.
To free her, Seyetik takes the place of the automated pilot and flies the shuttlepod into Epsilon 119 himself. The star ignites as planned, Nidell recovers with no memory of Fenna, and Sisko is left to mourn someone who never quite existed.