FrontMatter -- Acknowledgments -- Preface -- Contents -- Forging the Future of Space Science: The Next 50 Years -- John C. Mather -- From the Big Bang to the Nobel Prize and on to the James Webb Space Telescope--John C. Mather -- Ralph J. Cicerone -- Global Climate Change and Human Causes--Ralph J. Cicerone -- Wesley T. Huntress, Jr. -- Science Goes to the Moon and Planets: Celebrating 50 years since the IGY--Wesley T. Huntress, Jr. -- Carl E. Walz -- Leaving the Planet: Science and Technology Results on the International Space Station--Carl E. Walz -- Christopher F. Chyba -- The Possibility of Life Elsewhere in the Universe--Christopher F. Chyba -- Christopher Rapley -- Understanding the Poles of Earth, the Moon, and Mars--Christopher Rapley -- Edward C. Stone -- Voyager's Journey to the Edge of Interstellar Space--Edward C. Stone -- Charles Elachi -- Future of Space and Earth Robotic Exploration: Scientific and Technological Challenges and Opportunities--Charles Elachi -- Frank B. McDonald -- Explorer 1: Gateway to the Never Ending Wonders of Space Science--The Space Studies Board Van Allen Lecture delivered by Frank B. McDonald -- Appendixes -- Appendix A: The International Geophysical Year -- Appendix B: The Space Studies Board -- Appendix C:Program of Public Events.