Eugene Shoemaker

Eugene Shoemaker (1928-1997) was a distinguished Professor of Geology and Planetary Science at the California Institute of Technology (Caltech) from 1969-1985. He also held roles at the U.S. Geological Survey (USGS), including founding and directing its Branch of Astrogeology (1961-1966). He served as Chairman of Caltech's Division of Geology (1969-1972) and as a Distinguished Visiting Scientist at NASA's Jet Propulsion Laboratory (1980-1985).

Education: B.S. (1947), M.S. (1948) from Caltech; M.S. (1954), Ph.D. (1960) from Princeton University.

Research focused on celestial impacts, including co-discovering comet Shoemaker-Levy 9 (1994) and advocating for asteroid threat mitigation. He pioneered the Palomar Planet Crossing Asteroid Survey (1973) and led NASA's Clementine 2 mission planning. His work included analyzing lunar samples via Apollo missions and studying nuclear-test craters.

• Key contributions: Dinosaur extinction hypothesis via asteroid impact, astrogeology field development

Scientific legacy includes over 30 comet discoveries and 1,125 asteroid identifications with his wife Carolyn. Posthumously honored as a National Academy of Sciences member.