**Traffic Alert!**
Due to some minor construction and races in the area, please be aware of the following:

The COSI Planetarium—the largest in Ohio—features state-of-the-art digital technology that offers an unsurpassed glimpse of our incredible universe. The COSI Planetarium’s Digistar 7 projection system and 60-foot dome will transport you to the farthest reaches of the galaxy, to undersea volcanoes and distant lands, and even into the human body. For all who wonder, who question, who dream, your window to the universe is now open at COSI.

The following daily show times for the current planetarium show are:
10:30, 11:15, 12:00, 12:45, 1:30, 2:15, 3:00, 3:45.
Please note that times are subject to change and may differ on holidays or times at which COSI is open for extended hours. Seating is first come, first served.


Download the COSI Science app for up to date showtimes and more!


Now Showing: Eclipse - The Moments of Wonder
To prepare our guest for the upcoming eclipse and festivities, join us in the planetarium starting January 10th for: Eclipse - The Moments of Wonder. Learn as you watch immersive views of eclipses, one of the most spectacular sights in the sky, captured for the planetarium dome by world-renowned astrophotographers.

Coming soon

Assisted listening devices are available for all shows within the Planetarium at no extra cost. A photo ID is necessary to borrow the device. Please request the devices at the Guest Services desk. If you are planning a visit as a group you can make this request in advance.

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Rent It

Host your wedding, party, or private event under swirling galaxies and spectacular starscapes, no matter what the weather outside. The COSI Planetarium is available for weddings, birthday parties, corporate events, and family reunions, and offers customized starshows and seating for over 200 guests. For private rentals, please contact the This email address is being protected from spambots. You need JavaScript enabled to view it.. For birthday parties, please contact the This email address is being protected from spambots. You need JavaScript enabled to view it..