Zetar was a formerly inhabited planet in the Zetar system of the Alpha Quadrant. This was the homeworld for the Zetarians, an extinct humanoid species.
The planet was subject to a massive cataclysmic event which destroyed all corporeal life there. When all life died, only a hundred or so of the resident civilization lived on as a pattern of lights and non-corporeal energy. (TOS: "The Lights of Zetar")
External link[]
- Zetar II at Memory Beta, the wiki for licensed Star Trek works