Professor of Earth and Planetary Sciences, Physics and Astronomy; PhD, Harvard University
He is an expert in planetary atmospheres and astrophysics with a PhD in applied physics from Harvard, Docteur Honoris Causa, Observatoire de Paris; recipient Gerard P. Kuiper Prize, American Astronomical Society-Division for Planetary Sciences; American Geophysical Union fellow/3 sections; International Academy of Astronautics, member; Co-Investigator: Voyager Mission, New Horizon Pluto Mission, Space Shuttle (Atlantis-66) MAHRSI Instrument; Cassini Huygens Mission Interdisciplinary Scientist; and author of about 300 journal articles and book chapters. He started his career as a physicist at Kitt Peak National Observatory, Tucson, and then at the US Naval Research Laboratory, Plasma Physics Division before joining JHU in 1984.
Current Interests: Research, planetary atmospheres, outer solar system; Collaboration with current and former students, postdocs, colleagues on telescope observations by HST, JWST, ALMA.