The new 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 new Digistar 5 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 Sky Tonight
Our Universe Above

Presented LIVE by the COSI Team, this seasonal tour of the universe is a modern planetarium show in the classic tradition of stargazing, filled with stars, planets, constellations, current science news and audience interaction. Running time: Approximately 40 minutes.
Showtimes:
Wed - Sun: 11:30am, 1:30pm
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Back to the Moon for Good
Back to the Moon for Good

A new space race is on! We'll examine the history of space exploration and follow privately funded teams who are trying to land a robotic spacecraft on the Moon for the first time in more than 40 years. The first one there gets the $30 million Google Lunar XPRIZE. This global competition is designed to spark imagination and inspired a renewed commitment to space exploration, not by governments or countries - but by the citizens of the world. Narrated by Tim Allen. Approximately 40 minutes.
Showtimes:
Wed - Sun: 12:30pm, 2:30pm
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The Sky Tonight
One World, One Sky: Big Bird's Adventure

Explore the night sky with your favorite friends from Sesame Street! Follow along with Big Bird, Elmo and their friend from China, Hu Hu Zhu, as they take you on a journey of discovery to learn about the Big Dipper, the North Star, the Sun and the Moon. Running time: Approximately 40 minutes.
Showtimes:
Wed - Sun: 10:30am, 3:30pm
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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..