A system (short for planetary system) is one or more non-stellar objects that is orbiting one or more stars. In the Star Citizen universe, there are 100 known systems. There are 4 main factions that claim ownership over these systems: the United Empire of Earth, the Vanduul, the Xi'an Empire, and the Banu Protectorate. There are also two other categories of system affiliation - developing, which is a system that has one or more lifeforms that are in the process of developing as a species, or otherwise has a planet that could potentially develop sentient life, and as a result is being protected by the UEE under the Fair Chance Act; and unclaimed, which is a system that no major faction has claimed, for one reason or another. Each of these systems are connected to other systems by jump points of varying sizes, allowing for interstellar travel between systems.
A moon, also known as natural satellite, is an astronomical object that orbits a planet . There are 74 known moons in the Star Citizen universe. While they do not have classifications in the same way that planets do, there are many different types of moons, from dry, desert moons like Daymar, to frigid, frozen moons like Calliope, to moons with dense smog like atmospheres like Aberdeen.
An asteroid is a rocky object smaller than a planet that is orbiting a star, often in massive groupings with other asteroids, know as asteroid formations. These objects are the remnants of the formation of the larger bodies in the system, or sometimes are the result of collisions between a planet and moon or between two planets.There are 76 asteroids or asteroid formations in the Star Citizen universe, usually found as system rings, with the occasional asteroid cluster and single planetoid asteroid.
A space station is an artificial satellite, i.e., a man made construction that is orbiting a star, a planet, or a moon, usually with some amenities for passing ships to make use of, or otherwise with some specific function such as security or scientific research. There are 50 space stations in the Star Citizen universe, ranging from small truck stop like rest stops to planet-sized super stations like Archangel Station, and everything in between.