The promise and challenge of space endeavor -- The traditional bases of international law -- National consent to overflight. Airspace sovereignty: a brief historical survey ; The role of consent in the international law-making process ; The international geophysical year and the development of the law of space -- The limits of national sovereignty. How high does national sovereignty extend? ; Scientific consideration of the von Kármán line -- Sovereignty over celestial bodies. New lands and claims of sovereignty ; The problem before us -- Space vehicle regulations. Basic registration and safety laws ; Administrative problems ; Special problems -- Space communications. Some basic aspects of radio use ; The international problems ; Technical considerations -- Liability for personal and property damages in space activities. The domestic aspects of the problem: law in the United States ; International liability for space activities ; Genocidal crimes and torts -- Space medical jurisprudence -- Intergovernmental organizations in space activities. United Nations principal organs ; Specialized agencies affiliated with the United Nations ; United Nations Committee on the Peaceful Uses of Outer Space ; Other organizations -- Nongovernmental organizations. Direct international coordination of space activities throught the International Astronautical Federation ; IAF efforts to achieve international coordination of space activities though intergovernmental organizations ; Some other nongovernmental organizations in the international coordination of space activities -- Metalaw. The possibility of other worlds with intelligent life.