Jim Gunn - Professor of Astronomy (Princeton)

James Edward Gunn (born October 21, 1938) is the Eugene Higgins Professor of Astronomy at Princeton University.[1] Gunn's early theoretical work in astronomy has helped establish the current understanding of how galaxies form, and the properties of the space between galaxies. He also suggested important observational tests to confirm the presence of dark matter in galaxies, and predicted the existence of a Gunn–Peterson trough in the spectra of distant quasars.

Cosmology may look like a science, but it isn't a science... A basic tenet of science is that you can do repeatable experiments, and you can't do that in cosmology.
James E. Gunn[2]
Much of Gunn's later work has involved leadership in major observational projects. He developed plans for one of the first uses of digital camera technology for space observation, a project that led to the Sloan Digital Sky Survey, the most extensive three-dimensional mapping of the universe ever undertaken. He also played a major role with the Wide Field and Planetary Camera on the Hubble Space Telescope

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