The Tycho system is a star system, and is over a thousand light years from the Argus system. This system had at least four planets. (TOS: "Obsession")

In 2257, the Federation starship USS Farragut visited this system. Eleven years later, the USS Enterprise would pursue the dikironium cloud creature into this system.

• Tycho (primary)
  • Tycho I
  • Tycho II
  • Tycho III
  • Tycho IV