The Solar System is a very large system based around a yellow dwarf star, Sol. Settled by the Unified Human Compact, the system is by far the most expansive colonized system under human control. The third orbital, Earth, is the homeworld for Humanity, and considered to be one of humanities most important worlds. Earth was destroyed following the outbreak of The Flame in the 21st century AD. Mars serves as the capital world of the UHC, and has been the primary hub of humanity since Earths fall.