The Alpha Centauri system is the closest star system to earth. It was the first system the human race traveled to after the invention of the warp drive in 2264. It consists of three stars orbiting each other. Alpha Centauri A and B orbit each other directly in the center of the system, while the third star has a much larger orbit, and rotates off of a radius of about .2 lightyears. There are four planets in the Alpha Centauri system. Eris, the desert/valley planet inhabited by humans, and Niobe, the planet of seas and mountains that acts as the Niobans' home-world revolve near Alpha Centauri A and B. Morte, the gaseous rock planet of the Blighted follows an ovular path which crosses near Niobe once about every thousand years. The fourth planet in the star system is a molten planet which revolves in unison with the third star in the Alpha Centauri system. It is uninhabitable, and is often referred to as the "Black planet".