Fellow, American Association for the Advancement of Science (Chairman Section D Astronomy 1984)
American Astronomical Society:
Chairman Nominating Committee 1981
Member: Publications Board 1985-86
Member: Warner Prize Selection Committee 1977-78
Royal Astronomical Society
International Astronomical Union
University Chicago Track Club
Contributed to articles on radio astronomical investigations of comets and interstellar medium to tech. journals
Helen B. Warner Prize, 1975
Alfred P. Sloan Foundation Fellow, 1970-1972
Recipient: Bart J. Bok Prize, Contributions to Galactic Astronomy, 1969
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