Presents an overview of planetary science and the United States program for exploration of the planets, examining the program's scientific objectives, its current activities, and the diversity of its methods. Also discusses the program's lack of continuity, especially in personnel. (Author/JN)

Following a discussion of scientific opportunities for astronomy (galaxies and the universe, stars, and planets/life/intelligence), four programs recommended by the National Academy of Sciences' Astronomy Survey Committee are described, indicating areas that must be strengthened before undertaking the programs. Ongoing projects are also…