Outer Space Treaty

Between 1958 and 1962 during the Cold War, both the Soviet Union and the United States conducted Nuclear weapons tests in outer space (100 km from sea level), and the largest one was Starfish Prime. In 1967, the Outer Space Treaty banned the stationing and use of nuclear weapons in space. USA and USSR also agreed not to nuke the Moon. It was signed by all major space faring nations and it also prohibits claiming territory in space or on celestial bodies. The treaty considers space as "the shared heritage of mankind."