Triaminus was a star system, located somewhere in Klingon Empire space in the galaxy's Alpha or Beta Quadrants.

Triangulum was a star system, located in the galaxy's Alpha Quadrant, in the region of space visible from Earth in the constellation of Triangulum.

Tesum is a star system near the borders of the Federation, Klingon Empire and the Romulan Star Empire, located in the galaxy's Sagittarius Arm, somewhere in ...

Thasus was a star system, located somewhere in the galaxy's Alpha or Beta Quadrants, in Federation space at coordinates 6.02S 5.07E. (FASA RPG module: The ...

Tomed was a star system near the Romulan Neutral Zone, in the Alpha Quadrant. In the late 24th century, Tomed was on the Federation side of the Zone, ...

Theta Pictoris (also known as Catulla system or the Catullan system) was a star system in the galaxy's Alpha or Beta Quadrant, visible from Earth in the ...

Tholia was a star with an associated system, located at the heart of Tholian Assembly space in the galaxy's Alpha Quadrant. The Tholia system's orbit was ...

Tufem was a star system, located somewhere in the space of the galaxy's Alpha or Beta Quadrants. The Tufem vicinity was in in area claimed by the Romulan ...

Mamox is a star system near the borders of the Federation, Klingon Empire and the Romulan Star Empire, located in the galaxy's Sagittarius Arm, somewhere in ...

Yko was a moon located at coordinates 0.93S 3.18W in the galaxy's Beta Quadrant, in the space of the Federation. (FASA RPG module: The Federation) The world ...