My research has emphasized how solar radiation and the solar wind interact with planets and other objects in our solar system, such as comets. I am particularly interested in sources of X-ray emission throughout the solar system. The Space Physics group at KU has also recently undertaken a number of studies of the upper atmosphere of Titan and its interaction with Saturn's magnetosphere. I am a member of the science team for the Ion Neutral Mass Spectrometer (INMS) experiment onboard the Cassini spacecraft which is now orbiting Saturn.