The USS Enterprise in orbit of Ariannus
Ariannus is a planet which is in or near Federation space. Planet vital as a transfer point for commercial traffic.
In 2268, Ariannus was infected by a bacterial invasion that threatened to destroy all life. The crew of the Enterprise conducted an orbital decontamination mission to save the planet's inhabitants. (TOS:"Let That Be Your Last Battlefield")
- Ariannus was mentioned as a small note on a very large star chart graphic created for TNG:"Conspiracy." It was the image behind the chair in the room where Dexter Remmick was killed.