Professor
      Charles R. Alcock
Center for Astrophysics | Harvard & Smithsonian
      Astrophysicist; Educator
      Area
                                Mathematical and Physical Sciences
                            Specialty
                                Astronomy, Astrophysics, and Earth Sciences
                            Elected
                                    2006
                    Director. Led the search for Massive Compact Objects in the halo of the Milky Way (MACHOs) via gravitational microlensing and showed that they were not a major contributor to the Dark Matter inventory of the universe. Invented one of the first clean tests for the Cosmological Constant (the Alcock-Paczynski effect).
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