Donald Yeomans manages NASA's Near-Earth Objects Program Office at NASA's Jet Propulsion Laboratory, Pasadena, Calif. The office coordinates the search for and tracking of asteroids and comets passing into Earth's neighborhood to identify possible hazards to Earth. He also supervises JPL’s Solar System Dynamics Group, which keeps track of all solar system objects, including planets, moons, comets and asteroids. He was a science team member for the Deep Impact/EPOXI mission, which deployed an impactor that was "run over" by comet Tempel 1 in 2005 and flew close to comet Hartley 2 in 2010. Yeomans was also the U.S. project scientist for the Japanese-led Hayabusa mission that returned a sample from near-Earth object Itokawa in 2010, and a team chief for the Near-Earth Asteroid Rendezvous mission that orbited the asteroid Eros and landed on it in 2001. The first images of the return of comet Halley in 1982 were also obtained based on Yeomans' predictions.
Image credit: NASA/JPL-Caltech