Career of George B. Field, theoretical astrophysicist and administrator of astronomical research at the Harvard-Smithsonian Astrophysical Observatory (SAO). Discussions of education at Massachusetts Institute of Technology, Princeton and Harvard Universities, interest in cosmological problems; possible detection of hot intergalactic matter in 1964; colleagues at University of California at Berkeley; views on popularizing science; reactions to Sputnik launch in 1957; funding of research from the National Aeronautics and Space Administration (NASA); views on the manned space program; effects of Vietnam War on NASA and astronomical research; involvement with the Space Telescope; views of the Space Shuttle; extensive committee work for NASA; astronomical research under NASA; work at SAO; new programs at SAO, such as x-ray astronomy and the Multiple Mirror Telescope; service on the Jesse Greenstein and Allan Bromley survey committees of astronomy and physics; and his view of the universe. Also prominently mentioned are: Kinsey Anderson, Stuart C. Bowyer, Jim Bradley, Tony Calio, Riccardo Giacconi, Thomas Gold, Leo Goldberg, John Hagen, Noel Hinners, Fred Hoyle, Frank Martin, John Earl Naugle, Al Opp, Edward Mills Purcell, Martin Schwarzschild, Dennis William Sciama, Henry Smith, Sylvia Favior Smith, Lyman Spitzer, George Steiner, Frank Sulloway, Pat Thaddeus, James Van Allen, Fred Whipple; American Science and Engineering, Inc., Annual Review of Astronomy and Astrophysics, Congregational Church, Harvard College Observatory, Harvard University Society of Junior Fellows, High Energy Astronomy Observatory, Lick Observatory, National Academy of Sciences (U.S.) Astronomy Survey Committee, National Academy of Sciences (U.S.) Greenstein Committee, National Science Foundation (U.S.), New York Times, Orbiting Astronomical Observatory, Princeton University Matterhorn Project, Project Apollo, Skylab, Smithsonian Astrophysical Observatory Multiple Mirror Telescope, Smithsonian Institution National Air and Space Museum, Space Shuttle, United States Naval Ordnance Laboratory, United States Office of Management and Budget, United States Office of Naval Research, University of California at Berkeley, and Viking (Rocket).