Andromeda Galaxy
The Andromeda Galaxy was an inhabited galaxy located in the universe within relative proximity to the Milky Way. Andromeda had two satellite galaxies. ()

An image depicting the Andromeda Galaxy was scanned by the Talosians as they reviewed the library computer files on board  in 2254. ()

A picture of the Andromeda Galaxy was on display in the briefing room of the  when the crew was reviewing star charts to search for the origin of an unknown buoy. () 

An image of the galaxy was on display on one of the large bridge monitors aboard the . ()

An ancient humanoid race from the Andromeda Galaxy became extinct following the destruction of their homeworld when their sun went supernova. Remnants of the species survived for a time on scattered outposts but eventually died out, leaving their android populations on their own. One of these android-populated outposts was the planet Mudd in the Milky Way Galaxy. () 

Centuries ago, the Kelvans became aware of dangerously rising radiation levels in Andromeda, a development expected to make that galaxy uninhabitable for their species within ten thousand years (or ten millennia). The Kelvan Empire dispatched expeditions of multi-generational starships to explore the neighboring galaxies for territories suitable for conquest and occupation. Hypothetically, a  starship running at maximum warp would take thousands of years to complete the journey to Andromeda. ()

Points of Interest 
 Kelva
 Makers' homeworld

Appendix

Background information 
An older image of the Andromeda Galaxy appeared in the original "The Cage". This image was replaced for the remastered episode.

This galaxy was located in the Andromeda constellation.

The  number for this galaxy was M31. Both the Andromeda and the Milky Way were located within the  of galaxies. (Star Trek: Star Charts, p. 10)

The distance between the Andromeda Galaxy and the Milky Way Galaxy was either about one million light years () or about two million light years. (Stellar Cartography: The Starfleet Reference Library ("Federation Historical Highlights, 2161-2385"); Star Trek: Star Charts (p. 10))

In the real world, the Andromeda Galaxy is 2,537,000 light years from Earth.

Apocrypha 
In Star Trek Online, it is revealed in the mission "Uneasy Allies" that the Iconians have rebuilt their numbers inside a Dyson sphere in the Andromeda Galaxy in preparation for an invasion of the Milky Way.

See also 
 NGC

External links 
 
 
 

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Galaxies