Observatory near Chicago has a crater on the moon named after it?

You're thinking of the Yerkes Observatory, located in Williams Bay, Wisconsin, about 65 miles west of Chicago. It has a crater named Yerkes on the Moon in its honor.

The Yerkes Observatory was founded in 1897 and was home to the world's largest refracting telescope for many years. It was a significant contributor to astronomical research and played a crucial role in the development of the field of astrophysics.