Jim Gunn shaped the theory of the evolution of the cosmos before building cameras and spectrographs for major observatories like the Hubble Space Telescope.
About the author
Ann Finkbeiner has been a freelance science writer since 1983. She writes most frequently about cosmology and astronomy, and about science advice for the government. She has written several books, including A Grand and Bold Thing, and is a co-proprietor of the group science blog, The Last Word on Nothing.
