Welcome

The Horwitz - DeRemer Planetarium

  • The original School District of Waukesha Charles Horwitz Planetarium opened in January 1978 and named after Mr. Charles Z. Horwitz, a well-respected Science Teacher, Principal, and Science Director for the School District of Waukesha.

    A new planetarium was built in 2005 to replace the original facility and is located in Waukesha County’s Retzer Nature Center. In the Spring of 2018, the planetarium was renamed. David A. DeRemer was director of the planetarium from 1978 to 2018. In 2005, Dave received the Lifetime Excellence in Education Award from the Waukesha Education Foundation and was instrumental in fund-raising, planning, and building the new planetarium. To honor Dave’s commitment to the success of the planetarium and to recognize his dedication to the students and community of Waukesha, the “Friends of the Planetarium” and School Board of Waukesha voted to rename the planetarium the Horwitz – DeRemer Planetarium.

    The planetarium is not only an accurate day and night sky projection system, but the program serves as a district and community science resource center. School and community programs are designed to meet state and national astronomy standards, but these programs also present fundamental science concepts of weather, climate, chemistry, physics, and earth science.

    A Community Resource (Retzer Nature Center)
    The planetarium shares a cooperative agreement with the Waukesha County Park System to serve the community as a local earth and space science resource. With the emphasis on family programming, the planetarium presents daily and weekend astronomy shows to the public. The planetarium is also available for private groups such as scouts, church groups, birthday parties, science clubs, senior citizens, or daycare centers. Regular public sky-watching sessions are provided by the planetarium, providing members of the community opportunities to observe sky objects through telescopes and binoculars.

    To visit their website CLICK HERE.

Retzer building
  • Planetarium Fundraiser Event- Romance Under the Stars
    Location: Horwitz-DeRemer Planetarium
    When: Thursday, February 14,
    7:00 pm

    Audience Recommended for Adults
    Cost: $25 per couple
    Register by February 10th as space is limited.
    Show Description: This Valentine's Day, treat your special someone to a romantic tour of the universe at the Horwitz-DeRemer Planetarium feature presentation "Romance Under the Stars." The beauty of the night sky brings out the romantic side in all of us. Explore the current night sky with your Valentine in the comfort of the planetarium. A flower and Chocolates will be given to each couple.  This event is rated AC -- Adult couples only. Only one person needs to register from each couple. This is a fundraiser for the Horwitz-DeRemer planetarium. All proceeds go toward future upgrades and future shows.

  • Christmas Parties
    Our Christmas Shows would make a great Christmas Party for your staff or family or friends. If you are interested in trying to schedule a private show yet this year, please contact the planetarium at 262-970-4139.  

  •  Where is the Planetarium?

    We are located within the
    Retzer Nature Center County Park
    S14 W28167 Madison St.
    Waukesha, WI 53188
    Horwitz DeRemer
    Planetarium
    Phone: 262-970-4139

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