1969-1981: Professor of of Planetary Science & Astronomy, Caltech
1966-1969: Associate Professor of Planetary Science & Astronomy, Caltech
196~1966: Assistant Professor of Astronomy & Geophysics, UCLA
1963-1964: Postdoctoral Fellow, Cambridge University
1961-1963: Instructor (part time), Cornell University
Honors
Woodrow Wilson Honorary Fellowship, 1960-1961; Andrew Dixon White Fellowship, 196O~1961; National Science Foundation Fellowship, 1961-1963; National Academy of Sciences, National Research Council Postdoctoral Fellowship, 1963-1964; Sloan Foundation Fellowship, 1968-1970; Elected Na-tional Academy of Sciences, 1972; Elected American Academy of Arts and Sciences, 1973; Henry Norris Russell Lecturer of the American Astronomical Society, 1979; California Scientist of the Year, 1981; Chapman Medal of the Royal Astronomical Society, 1985; Dirk Brouwer Award of the Division on Dynamical Astronomy of the American Astronomical Society, 1986; Amos de Shalit Lecturer at the Weitzmann Institute, 1986; Thomas Gold Lecturer at Cornell University, 1987; Regents Fellow, Smithsonian Institution of Washington, 1988-1990; Miller Professorship, University of California at Berkeley, 1990; Kuiper Prize of the Division for Planetary Science, Amencan Astronomical Society, 1992; Morris Loeb Lecturer, Harvard University, 1992; Gold Medal of the Royal Astronomical Society, 1993; National Medal of Science, 1995; Sackler Lecturer, University of Toronto, 1998; Antoinette de Vaucouleurs Medal, University of Texas, 1999; Nathan Rosen Distinguished Lecturer, Technion, 1999 |
