by Nathaniel Kleitman and Eugene Aserinsky.
The University of Chicago Department of Astronomy and Astrophysics operated the Yerkes Observatory in Williams Bay, Wisconsin from 1897 until 2018, where the largest operating refracting telescope in the world and other telescopes are located.
=== Professional schools ===
The university contains eight professional schools.
The University of Chicago Divinity School was the first professional school at the University of Chicago, chartered in 1865 and incorporated into the university in 1890. It offers four graduate degree programs as well as undergraduate course offerings. It has been accredited by the Association of Theological Schools in the United States and Canada since 1938.
The Graham School of Continuing Liberal and Professional Studies, originally known as the university-Extension program, was established in 1892. The school offers various non-degree courses and certificates as well as degree programs. In 1997, it was renamed to the William B. and Catherine …
