Eric J. Chaisson (pronounced chase-on, born on October 26, 1946 in Lowell, Massachusetts) is an American astrophysicist known for his research, teaching, and writing on the interdisciplinary science of cosmic evolution. He is a member of the Center for Astrophysics | Harvard & Smithsonian, teaches natural science at Harvard University and is an elected Fellow of the American Association for the Advancement of Science.