Dr. Eisner studies star and planet formation and develops instrumentation and techniques that enable observational probes of these processes. He is currently working to probe potential planet forming zones around young stars with a variety of novel techniques, including adaptive optics, infrared interferometry, millimeter-wave interferometry, and spectro-astrometry. Recent research highlights include the mapping of dust and gas in the terrestrial planet forming region around young stars, and the finding that most stars may lack sufficient material to build planetary systems like our own.