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Ariannus remastered.jpg


Type: Planet
Affiliation: United Federation of Planets
The Explored Galaxy

The location of Ariannus in "The Explored Galaxy" star chart

Ariannus was an inhabited planet in a region of space governed by the Federation in the 23rd century.

Prior to stardate 5730, this world was established as a vital transfer point for the regular space commercial lanes. There were a billion people living on this planet. The nearest starbase was Starbase 4.

In 2268, Ariannus was infected by a bacterial invasion that threatened to destroy all life on the planet. The crew of the USS Enterprise, working in tandem with the planet's ministry of health, conducted an orbital decontamination mission to save the planet's inhabitants. (TOS: "Let That Be Your Last Battlefield")

In 2293, the location of Ariannus in the Milky Way Galaxy was labeled in a star chart that was in Captain James T. Kirk's quarters aboard the USS Enterprise-A. (Star Trek VI: The Undiscovered Country, okudagram)

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