I am a professor of Astronomy and Physics at Yale University, and these pages describe some of the work in our group. My research interests span a wide range, from stars and stellar populations to the most distant galaxies. I am also interested in astronomical instrumentation and telescopes. Bob Abraham and I built the Dragonfly Telephoto Array in New Mexico, a low surface brightness-optimized telescope. We are currently building MOTHRA, an 1140-lens telephoto array that will detect and study gas around and between galaxies.