Planetary Resources, Inc., a U.S. corporation, is preparing to begin commercial spaceflight operations aimed at mining and exploiting the resources of celestial bodies, such as minerals and water, beginning with near-earth asteroids. Based on recent progress in commercial aerospace industry developments and its own research and development efforts, the company believes that such operations are about to become feasible.

1. What treaty first addressed international law applicable to property and mineral rights on earth's moon and other celestial bodies?
2. Identify the principles set forth in that treaty.
3. Has the U.S. signed that treaty?
4. Has an international regime been established to more specifically govern the property and mineral rights of businesses engaged in the exploitation of such resources?