Institution: | Institute of Astronomy, Madingley Road, Cambridge CB3 0HA; Jet Propulsion Laboratory, 4800 Oak Grove Drive, Pasadena, CA 91109, USA; School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham B15 2TT; Lick Observatory, University of California, Santa Cruz, CA 95064, USA; Goddard Space Flight Center, Greenbelt MD 20771, USA |