Steven J. Dick is the former Chief Historian for NASA. He obtained his B.S. in astrophysics (1971) and his M.A. and Ph.D. (1977) in history and philosophy of science from Indiana University. He worked as an astronomer and historian of science at the U.S. Naval Observatory in Washington, DC, for 24 years before coming to NASA Headquarters in 2003. Among his books are Plurality of Worlds: The Origins of the Extraterrestrial Life Debate from Democritus to Kant (1982), The Biological Universe: The Twentieth Century Extraterrestrial Life Debate and the Limits of Science (1996), and Life on Other Worlds (1998). The latter has been translated into Chinese, Italian, Czech, Polish and Greek. His most recent books are The Living Universe: NASA and the Development of Astrobiology (2004) and a comprehensive history of the U.S. Naval Observatory, Sky and Ocean Joined: The U.S. Naval Observatory, 1830–2000 (2003). The latter received the Pendleton Prize of the Society for History in the Federal Government.  He is editor of Many Worlds: The New Universe, Extraterrestrial Life and the Theological Implications (2000), editor (with Keith Cowing) of the proceedings of the NASA Administrator's symposium Risk and Exploration: Earth, Sea and the Stars (2005), and (with Roger Launius) of Critical Issues in the History of Spaceflight (2006) and Societal Impact of Spaceflight (2007). He is the recipient of the Navy Meritorious Civilian Service Medal. He received the NASA Group Achievement Award for his role in NASA’s multidisciplinary program in astrobiology. He has served as chairman of the Historical Astronomy Division of the American Astronomical Society as president of the History of Astronomy Commission of the International Astronomical Union, and he as president of the Philosophical Society of Washington.  He is a member of the International Academy of Astronautics.