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.

Subtitling is offered in COSI’s Planetarium for One World, One Sky and Wildest Weather in the Solar System. Hearing assist devices are available for all shows within the Planetarium. No special reservations or advance notice is required, simply notify the Planetarium usher that you would like the subtitled version of show as you hand them your ticket. If you are planning a visit as a group you can make this request in advance.

Now Available: Planetarium Only tickets!

One World, One Sky

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.
Especially for children 2-7 | Running time: Approximately 40 minutes.

Sept 22 - Jan 25: 11:15am*
*No showings on Dec 29th


Starry Nights Live

Starry Night Live

This live show explores what can be seen in the sky tonight in central Ohio. Discover the current stars, constellations, planets, and deep sky objects that fill the starry night.
Best for ages 7+ | Running time: Approximately 22 minutes.

Jan 6 - Mar 22: 12:15pm | 3:15pm

Wildest Weather in the Solar System

Wildest Weather in the Solar System

Take a spectacular journey to witness the most beautiful, powerful, and mysterious weather phenomena in the solar system. From a storm the size of a 100-megaton hydrogen bomb, to a 400-year-old hurricane, to a dust tempest that could engulf entire planets, you'll be glad you live on Earth! Fly through the thick atmosphere of Venus, magnetic storms on the sun, liquid methane showers on Titan, and anticyclones whirling at hundreds of miles per hour on Jupiter.
Best for ages 8+ | Running time: 25 minutes.

Sept 22 - Mar 22*: 1:15pm | 4:15pm
*No showings on Dec 29

Planetary Treasure Hunt

Planetary Treasure Hunt

Search the solar system for hidden treasure with COSI’s Planetary Treasure Hunt. Climb on board the magical Starship C.O.S.I. 43215 for a visit to Mars, Saturn, the Moon and more. You might even experience an alien encounter or two, so keep your eyes peeled – the aliens’ riddles just might help you find the Northern Crown’s missing jewels.
Especially for children 5-10 | Running time: Approximately 25 minutes.

Jan 6 - Jan 25: 2:15pm

Teacher's Choice Show

Teacher's Choice Show

See the shows of your choice during your field trip or group visit, including Cell! Cell! Cell!, Black Holes: The Other Side of Infinity, Our Solar System, Back to the Moon for Good, Wildest Weather in the Solar System, One World One Sky: Big Bird's Adventure, and Our Universe Above. Learn More

Daily: 9:00am | 9:15am | 9:30am | 9:45am

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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..