Space Science Institute

Professor of Stellar Astrophysics, University of Vienna

Department of Astronomy, University of Massachusetts - Amherst

Heidelberg University

Professor Emeritus, RSAA, The Australian National University

Professor of Physics and Astronomy, Vanderbilt University

Senior Astrophysicist, Smithsonian Astrophysical Observatory

Professor of Planetary Science, California Institute of Technology

Professor of Astronomy and Astrophysics, UCLA

Professor of Astrophysics, Bonn University