Space and National Security Practice Test

The main idea tested is that outer space, including the Moon and other celestial bodies, is to be used for peaceful purposes and not subject to national appropriation or militarization on those bodies. The Outer Space Treaty of 1967 says the Moon and other celestial bodies shall be used exclusively for peaceful purposes and forbids military bases, installations, or testing of weapons on them. It also prohibits placing nuclear weapons or other weapons of mass destruction in orbit around Earth or on celestial bodies, and it bars any nation from claiming sovereignty over outer space or its bodies.

So the statement that the Moon and celestial bodies are to be used for peaceful purposes with no military installations or weapons tests aligns with those provisions, making it true. The other options don’t fit: nations cannot claim sovereignty over the Moon; WMD cannot be placed in orbit; conventional weapons aren’t banned outright in space by the treaty.