George Whipple Clark (August 31, 1928 – April 6, 2023) was an American astronomer and professor emeritus at the Massachusetts Institute of Technology. When he retired, M.I.T. described him as "a central figure in the development of high-energy astrophysics, particularly in the design, analysis, and interpretation of experiments for the study of high-energy cosmic ray particles and the celestial sources of gamma rays and X-rays."[1]