The University of Chicago has announced plans to wind down its activities at Yerkes Observatory in Williams Bay, Wis., over the next six months and to formally cease on-site operations by Oct. 1, 2018.

The upcoming summer season will therefore be the final season of University activities at Yerkes. The University is announcing the plans well in advance in order to engage with Yerkes staff and nearby communities, including the village of Williams Bay, in considering long-term plans for the property.

Despite its important history, the Yerkes facility and its instrumentation no longer contribute directly to the research mission of the University of Chicago, which has made major investments in the Magellan and Giant Magellan telescopes in Chile. Yerkes has continued to make important contributions through its education and outreach programs, and that work, which remains important to the University, will now relocate to the Hyde Park campus.

“Science at Yerkes in the 20th century led to key discoveries and advances in the field of astronomy, when the observatory helped build the foundation for modern astrophysics,” said Edward (Rocky) Kolb, dean of the Division of the Physical Sciences and a professor in the Department of Astronomy & Astrophysics. “It is an important part of the history of the University, and we hope it will become, in some form, a valuable resource to the surrounding community and visitors to the Lake Geneva area.”

Since the observatory was established by the University in 1897, it has been the home of groundbreaking work by scientists such as George Ellery Hale, Edwin Hubble and Subrahmanyan Chandrasekhar. The facility was the home of UChicago’s Department of Astronomy and Astrophysics from the time it opened until it began relocating to Hyde Park in the 1960s. In recent decades, the University’s research in observational astronomy has shifted to using facilities located all over the globe and in space.

The University and staff at Yerkes will honor existing commitments for events at the facility scheduled before Oct. 1, and will accept new bookings on a case-by-case basis.

“Unfortunately, operating Yerkes no longer makes sense for the University from a programmatic or cost standpoint. Drawing to a close our operations there is the first step in a collaborative process to determine the ultimate disposition of the buildings and property,” said David Fithian, executive vice president of the University. “We currently have no specific plans nor have we approached any potential buyers.”

Derek Douglas, vice president for civic engagement and external affairs, will represent the University in discussing options with the leadership of Williams Bay and its residents starting this month.