The concept of space law, an aspect of international law, began with United States President Dwight D. Eisenhower's introduction of the idea into the United Nations in 1957, in connection with disarmament negotiations. The United Nations General Assembly assumed responsibility for all outer space matters and discharged it primarily through its Committee on the Peaceful Uses of Outer Space (COPUOS). It was established in 1958, shortly after the launch of Sputnik, the first artificial satellite to be put into outer space by the Soviet Union, as an ad hoc committee. In 1959 it was formally established by United Nations resolution 1472 (XIV). At that time the Committee had 24 members. Since then it has grown to 69 members and is one of the largest Committees in the United Nations.
The mission of COPUOS is "to review the scope of international cooperation in peaceful uses of outer space, to devise programs in this field to be undertaken under United Nations auspices, to encourage continued research and the dissemination of information on outer space matters, and to study legal problems arising from the exploration of outer space."
The boundary between airspace, the air over each national territory which is subject to that country’s sovereign control, and outer space remains open to debate. Some favor definitions based on the composition of the atmosphere. Others favor a functional approach; if commercial airlines use a particular layer of the atmosphere, it should be considered airspace.
The current international legal rules on outer space rest on five treaties. They are the Treaty on Principles Governing the Activities of States in the Exploration and Use of Outer Space, including Other Celestial Bodies (Outer Space Treaty of 1967), the Agreement on the Rescue of Astronauts, the Return of Astronauts and the Return of Objects Launched into Outer Space (Rescue Agreement), the Agreement Governing the Activities of States on the Moon and