From the Adler Planetarium website:

Our Wednesday hours, from 4:00 pm–10:00 pm (last admission 9:00 pm), are the perfect time to roll up your sleeves and let curiosity be your guide! Join us after work, after school, or for date night at the Adler Planetarium. You’ll find hands-on, minds-on activities, experiences, and shows about the universe that will blow your mind!

Our award-winning sky shows are not to be missed. Imagine the Moon with us, search for a new ninth planet, take a fast-paced tour of the solar system, get to know the sky above Chicago, and fly through the stars at impossible speeds in our state-of-the-art theaters. Check out trailers for all of our sky shows!

Best of all? Every Wednesday is free Museum Entry for Illinois residents with proof of residency! To show proof of residency, you can use a valid Illinois driver’s license or photo ID, Illinois student ID with photo, or a photo ID plus a document (utility bill, lease, etc.) that shows your name and Illinois address.

All tickets must be bought online, in advance of your visit. All sales are final. Book your tickets for Adler at Night if you’re an Illinois resident or non-Illinois resident.