Josh Winn is a physicist and astronomer at Princeton University. His research goals are to explore the properties of planets around other stars, understand how planets form and evolve, and make progress on the age-old question of whether there are other planets capable of supporting life. His group uses optical telescopes to study exoplanetary systems, especially those in which the star and planet eclipse one another. Recent work has focused on the orbital architecture of planetary systems: the sizes, shapes, and orientations of the orbits, and the stellar obliquity. He was a Participating Scientist in the NASA Kepler mission and is a Co-Investigator in the ongoing Transiting Exoplanet Survey Satellite mission. Over the years, he and his group have also pursued topics in stellar astronomy, planetary dynamics, radio interferometry, gravitational lensing, and photonic bandgap materials. He has produced two lecture series for the Great Courses: The Search for Exoplanets and Introduction to Astrophysics.