The Sol Star System is the location of the planet Earth, the captial of the Earth Federation and cradle of humanity. It is the most populated star system in the known galaxy, making up at least 1/10 of the Federation population by itself.

The Sol System contains the worlds Earth, Luna, Mars, Europa, Ganymede, Callisto, Ceres, Triton as well as many space stations and settlements on other moons and asteroids.

Its nearest neighboring star system is the Centauri System.