- For other uses, see Zorn.
Theta Rill (also known as the Zorn system) was a star system, located somewhere in the space of the galaxy's Alpha or Beta Quadrants, in Federation space at coordinates 2.09S 5.26W. The Theta Rill system's orbit was the location of a number of worlds, including first planet Zorn I and second planet Zorn II. (FASA RPG module: The Federation)
- The stellar notation using the Greek language letter "theta" indicates that there might be a star group or constellation of some sort named "Rill", of which Theta Rill would logically be indicated to be the eighth most prominent star or system.