SOLD OUT – Exploring the Night Sky with the 24″ Reflector
This tour is sold out for 2026. This immersive 2-hour experience illuminates the inner-workings of Yerkes after dark.
SOLD OUT – Open Houses
Our Open Houses are sold out for 2026. Check back for more info in 2027! Hands-on discovery for all ages. Interactive demonstrations, themed evenings, and joyful exploration across science, nature, history, and the arts.
SOLD OUT – Exploring the Night Sky
This tour is sold out for 2026. When skies are clear, view the cosmos through the Great Refractor and experience astronomy as it was meant to be.
Astronomy on Tap
Join us at Duesterbeck’s Brewing Company (N5543 County Rd O, Elkhorn, WI) on Friday, October 9 at 6 p.m. for this free event.
Frostlights
Yerkes transforms into a winter galaxy of light and sound inside the architectural masterpiece dome housing the world’s largest lens telescope.