John N. Bahcall

John Norris Bahcall was an American astrophysicist and the Richard Black Professor for Astrophysics at the Institute for Advanced Study. He was known for a wide range of contributions to solar, galactic and extragalactic astrophysics, including the solar neutrino problem, the development of the Hubble Space Telescope, and his leadership and development of the Institute for Advanced Study in Princeton.