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Yerkes Observatory

4.8

About this business

The stars have cast their spell on romantics, scientists, seafarers, and backyard astronomers for ages. Since 1897 Yerkes Observatory has played a leading role in the exploration of the stars and our universe. Now, the site of the Great Refractor telescope is embarking on its next chapter, an independent organization offering new opportunities for you to experience astronomy, culture, and science. Our mission: to nurture the curious minds of a new century. Reopening activities are underway and we’re ready for your visi... read more

Location details

373 W Geneva St, Williams Bay, WI, 53191, United States

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WeekdayScheduleStatus
Mon09:30 a.m. to 5:30 p.m.
TueClosed
WedClosed
Thu09:30 a.m. to 5:30 p.m.
Fri09:30 a.m. to 5:30 p.m.
Sat09:30 a.m. to 5:30 p.m.
Sun09:30 a.m. to 5:30 p.m.
4.8768 reviews
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Robert Gorczyca's profile image
Robert Gorczyca 
on Google
6 days ago

Best electronics data base largest lenses. 

Eric Schwarz (Schwarttzy)'s profile image
Eric Schwarz (Schwarttzy) 
on Google
a week ago

The tour was fun, the building's architectural design played more into it than I thought. It was enjoyable getting to see the photo of Albert Einstein and the book with Carl Sagan signature from checking it out. I now look forward to doing a night tour so that I can look through the telescope. I wish there was a greater emphasis on the math and science that came from this telescope. 

Jason Kuhn's profile image
Jason Kuhn 
on Google
a week ago

A hidden gem of southern Wisconsin. Beautiful grounds, amazing architecture and history. They have big tubes you can look through, that make faraway things appear closer! 

Lynn Sutherland's profile image
Lynn Sutherland 
on Google
a week ago

The space & spaces tour was life-changing. Ken was an incredible tour guide — you can see how passionate he and the rest of the staff are about the history and future of this observatory. I enthusiastically recommend getting tickets this tour!! We went at 2:30pm on a Saturday with a large 40+ person tour group, but it felt so intimate. Thank you so much for your knowledge and for keeping the observatory lights on. I can’t wait to be back. 

Robert Runnels's profile image
Robert Runnels 
on Google
a week ago
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Frequently asked questions about Yerkes Observatory

How is Yerkes Observatory rated?

Yerkes Observatory has a 4.8 star rating with 768 reviews. 

When is Yerkes Observatory open?

Yerkes Observatory is closed now. It will open tomorrow at 9:30 a.m. 

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