The Agreement Governing the Activities of States on the Moon and Other Celestial Bodies, better known as the Moon Treaty or Moon Agreement, is an international treaty that turns jurisdiction of all celestial bodies (including the orbits around such bodies) over to the international community. Thus, all activities must conform to international law, including the United Nations Charter.
In practice it is a failed treaty since it has not been ratified by any state which engages in self-launched manned space exploration or has plans to do so (e.g. the United States, some member states of the European Space Agency, Russia, People’s Republic of China, Japan, and India) since its creation in 1979, and thus has a negligible effect on actual spaceflight. As of 2014, it has been ratified by 16 states.