In 2041 the Lunar Gate Accident turned most of Luna (the Moon) into an unstable ring around the planet that near-constantly showers the Earth with meteorites. Most of Earth’s population migrated to other worlds. Those remaining typically live in underground settlements. Some tribes of humans still live on the surface but they are supposedly primitive and mutated radiation. Little is known of Earthbound culture(s) as most non-earthers only have contact with Gateway Station, even though for the last 14 years Earth has engaged in mining and trade throughout the solar system.
Gateway Station – the largest man-made object to ever orbit Earth, Gateway Station is the corporate headquarters and crowning achievement of the Weyland-Yutani Company.
It is one of the largest zero gravity macro-construction yards and home to some of the premier laboratories in the solar system. It is also home to “Quarantine,” a process overseen by Weyland-Yutani to verify no contaminates enter (or leave?) Earth’s biosphere.