Eugene Shoemaker (or Gene Shoemaker) (April 28, 1928 - July 18, 1997) was one of the founders of the field of planetary science, best known for co-discovering the Comet Shoemaker-Levy 9, with his wife Carolyn Shoemaker and David Levy.
For his Ph.D. at Princeton, Dr. Shoemaker conclusively showed that Barringer Meteor Crater arose from meteor impact.
Dr. Shoemaker founded the Astrogeology Research Program of the USGS in 1961 and was its first director. He was prominently involved in the Lunar Ranger missions to the Moon, which showed that the Moon was covered with a wide size range of impact craters. Dr. Shoemaker was also involved in the training of the American astronauts.