Prof. Fabrycky studies the dynamics of extrasolar planets. Over the past 2 decades, discoveries of planets orbiting other stars have poured in from a variety of different detection techniques, and the resulting menagerie of planetary types and system architectures poses many theoretical issues.

Fabrycky studies how the observations constrain the configurations of these exoplanetary systems, as well as how gravitational interactions, tidal effects, and energy dissipation shape them.