Join us for Open Houses this year! Each event is rain or shine and includes a variety of activities for you and your family. Every open house has a theme, so please see the list below. This does not include the use of the telescopes in the building. Reservations are required. 

Tickets for this event cost $5 per child and $10 for adults and are available online only. There will not be parking onsite at the Observatory. Ticket holders must park at Williams Bay School and board an accessible trolley that will run a continuous shuttle between the school and observatory during the Open House. Only ticket holders will be admitted on the trolleys.

• March 9, 6pm-8pm Messier Marathon Open House
• April 8, 1pm-5pm – Solar Eclipse Community Day
• July 11 7:30pm-9:30pm – Asteroid Evening Open House
• Sept 17 8-10pm – Lunar eclipse Open House
• October 5- Community Day

As we get closer to each event, please check back at our blog for a schedule of events (the schedule of events will change for every event). We hope to see you there!