Hugh Van Horn received a Ph.D. from Cornell University and was a faculty member in the Department of Physics and Astronomy at the University of Rochester for almost three decades; he is now a professor emeritus of that University. He also served as the Director of the Division of Astronomical Sciences at the National Science Foundation. Van Horn is now an emeritus member of the American Astronomical Society and a Fellow of the American Association for the Advancement of Science. During his academic career, he published more than 100 technical papers in astrophysics and physics, and he has edited or written several books in these subjects.