The information from this article is from a non-official source and is therefore not canon.

Andromeda is a Class 3IR planet, meaning it has blue skies and green grass, and is also heavily populated, although not all parts are too welcoming. Housing on Andromeda comes in the form of white, mushroom-like houses, where all living space is on the top floor, accessed by an elevator. It is the home planet of the Andromedan (unofficial) and Andromedean races

Roger Wilco visited Andromeda in order to visit Xavi, who lived there.

The planet Andromeda in SQ0 is based on the small planet in the Andromeda System in Space Quest 3 manual.