Katherine de Kleer is an Assistant Professor of Planetary Science and Astronomy at Caltech. She and her research group investigate the surface environments, atmospheres, and thermochemical histories of the Solar System's planets and satellites through studying observational signatures at optical, infrared, and radio wavelengths. Research topics include the galilean satellite surface and atmospheric properties; the volcanism and tidal heating of Io; the surface properties of M-type asteroids, and the seasonal evolution of planet and satellite atmospheres.