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.
Director’s Hidden Spaces
Wind through staircases, corridors, and tucked-away rooms rarely open to the public. A behind-the-scenes look at the observatory few get to see.
Space & Spaces Tour
Stand beneath the world’s largest refracting telescope. Explore sweeping architecture and the human stories that shaped modern astronomy.
Frostlights
Yerkes transforms into a winter galaxy of light and sound inside the architectural masterpiece dome housing the world’s largest lens telescope.
Yerkes Candlelight Walk
It’s the Yerkes’ Annual Candlelight Walk through 2,000 candles! Friday, October 23rd & Saturday, 24th from 7-9:30 pm.