Space stations are player-made orbital bodies found across the universe in Waste of Space.
Overview
Space stations vary wildly in purpose, form, design, etc. as they are completely player-generated structures. However, they all share basic traits: They orbit around a celestial body or float freely in space, and they tend to require lots of resources to construct and maintain.
The basics that almost all space stations need include power generation, one or more airshields (if it is to be habitable), and a basic frame made of a some durable and malleable material.