
November 12, 2025
Our current planetarium system has served us well for many years, but technology has advanced dramatically since it was installed. Upgrading to Digistar 2025 will ensure we can ...

November 12, 2025
Our current planetarium system has served us well for many years, but technology has advanced dramatically since it was installed. Upgrading to Digistar 2025 will ensure we can ...

March 24, 2026
NEW from the Horwitz-DeRemer Planetarium...public show punch cards! You may purchased these in quantities of 5 or 10 visits. They would certainly make a great gift for any astrono...

March 24, 2026
Please view our NEW brochure that highlights our schedule for May - August. Want all of this information and more, please go to our events page. Remember the best place to ...

March 24, 2026
Please view our NEW brochure that highlights our schedule for May - August. Want all of this information and more, please go to our events page. Remember the best place to ...

March 10, 2026
Join us for the Beer Garden hosted by Friends of Retzer on Friday, July 31 from 4–8 PM at the beautiful Retzer Nature Center (S14 W28167 Madison St., Waukesha) for an evening fill...

February 25, 2026
Calling all young astronomy and art enthusiasts! Join the Horwitz-DeRemer Planetarium for the very first session of “Art Among the Stars.” Jenny Carter, a FRIEND of the Horwitz-De...

December 17, 2025
Please view our NEW brochure that highlights our schedule for January - April. It has tons of special event fun, great fan-favorite shows, and even a few NEW shows! Want all of...

December 17, 2025
Please view our NEW brochure that highlights our schedule for January - April. It has tons of special event fun, great fan-favorite shows, and even a few NEW shows! Want all of...

December 17, 2025
Join us for an unforgettable laser show! Tickets are $8, and every extra dollar you choose to give directly supports the Planetarium’s “Don’t Let the Planetarium Go Dark” campaig...

December 17, 2025
Join us for an unforgettable laser show! Tickets are $8, and every extra dollar you choose to give directly supports the Planetarium’s “Don’t Let the Planetarium Go Dark” campaig...
