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Wiki information Bahcall:
John Norris Bahcall was an American astrophysicist, best known for his contributions to the solar neutrino problem, the development of the Hubble Space Telescope and for his leadership and development of the Institute for Advanced Study in Princeton.
Neta Bahcall is an astrophysicist and cosmologist specializing in dark matter, the structure of the universe, quasars, and the formation of galaxies. She is the Eugene Higgins Professor of Astronomy at Princeton University.