Beyond Earth's Boundaries: Human Exploration of the Solar System in the 21st Century. 1988 Annual Report to the Administrator.

In June 1987, the National Aeronautics and Space Administration (NASA) Administrator established the Office of Exploration in response to a national need for a long-term goal to energize the civilian space program and stimulate the development of new technology. This document describes work accomplished in developing the knowledge base that will permit informed recommendations and decisions. Major sections included are: (1) "Pathways to Human Exploration" (describing three strategies in the space program); (2) "Human Exploration Case Studies" (including four case studies on expeditions to Phobos and Mars, the lunar observatory, and the lunar outpost with background and strategy, scenario, and requirements); (3) "Case Study Results and Assessment"; (4) "Exploration Program Implementation Strategy" (illustrating four phases during 1980 to 2010); (5) "Approach to International Cooperation"; (6) "Recommendations"; and (7) "Future Horizons." (YP)