Outer Space Treaty

The Outer Space Treaty, also known as the Treaty on Principles Governing the Activities of States in the Exploration and Use of Outer Space, including the Moon and Other Celestial Bodies, is a treaty that forms the basis of international space law. It was opened for signature in 1967 and has been ratified by 110 countries. The treaty prohibits the placement of nuclear weapons or any other weapons of mass destruction in orbit or on celestial bodies, and establishes that outer space, including the Moon and other celestial bodies, is not subject to national appropriation. It also establishes that space exploration and use should be carried out for the benefit of all countries and that astronauts are envoys of mankind in outer space, and should be given all possible assistance in the event of accident, distress, or emergency landing on the territory of another State or on the high seas. The treaty has been instrumental in promoting international cooperation in space activities and has paved the way for the development of space law and the peaceful exploration and use of outer space.