Come to the Planetarium Programs in Waukesha this winter 2019! The Planetarium is located at the Retzer Nature Center in Waukesha. The programs are on February 16 and 23, and March 2, 9, 16, 23, and 30. All children's programs are at 11:00 am and have a $5 admission.  In February see One World, One Sky. Explore the night sky with our friends from Sesame Street™.  Join Big Bird, Elmo, and Hu Hu Zhu as they take a trip to…