Columbia University

Distinguished Professor, University of California Santa Cruz

Professor, Columbia University and Flatiron Institute

Professor of Physics, Professor of Astronomy & Astrophysics; The Pennsylvania State …

Physics, University of Kentucky

Department of Physics & Astronomy, Montclair State University

Los Alamos National Laboratory

Cornell University

Professor of Astrophysics, University of Missouri, Columbia, MO 65211, USA

Professor of Physics, Columbia University