The 40 inch/102 centimeter refractor.
In addition to the Yerkes Refractor, the Observatory also has a 40 inch/102 centimeter reflecting telescope, and a 24 inch/61 centimeter reflecting telescope.
Current research includes the interstellar medium, globular cluster formation, infrared astronomy, and near-Earth objects. Additionally, the University of Chicago maintains a sizable engineering center in the Observatory, dedicated to making and maintaining scientific instruments.
The current director is Dr. Kyle M. Cudworth.