Our group explores the properties of exoplanetary systems, with emphasis on the measurement of basic geometrical parameters, and the detection of rare phenomena and extreme cases.  Some examples:  

• The shapes of planetary orbits 
• The orientation of orbits relative to each other 
• The orientation of orbits relative to the equatorial plane of the star
• Ratios of orbital distances and planetary sizes within multi-planet systems
• Frequency of occurrence of planets around Sun-like stars
• Detection of the very shortest-period planets
• Detection of circumbinary planets
• Evidence for orbital decay of hot Jupiters 

To achieve these goals, we often use archival data from the Kepler and K2 missions, and data from the ongoing Transiting Exoplanet Survey Satellite (TESS) mission.  Our group has been involved in TESS since its conception in 2006, and has performed simulations to support mission planning and follow-up observations. 

We also use ground-based telescopes, ranging in size from 1-meter (Las Cumbres Observatory) to 10-meter (Keck Observatory), and we have performed observations with the Hubble and Spitzer Space Telescopes.