You may also be looking for the Gamma 7 outpost or Gamma 7 sector.

The Gamma 7A system was an inhabited system. A planet in this system had billions of inhabitants. The planet orbited a fourth-magnitude primary. Gamma 7A was located in Sector 39J.

In 2268, after contact had been lost with the system, Starfleet Command sent the USS Intrepid to investigate. Like the system, the Intrepid was destroyed by a space amoeba. Soon after contact with the starship ceased, Starbase 6 ordered the USS Enterprise to investigate; the ship was finally able to destroy the amoeba. (TOS: "The Immunity Syndrome")