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Adler Planetarium

Chicago's Adler Planetarium offers free Earth Day programs

Chicago's Adler Planetarium is celebrating Earth Day with special programs and free admission for Illinois residents.

The planetarium is holding its second-annual Earthfest on April 22. That's the same day countries around the globe mark the start of the modern environmental movement.

In a news release Tuesday, planetarium officials say the event will "celebrate the planet we call home" and include discussions "about protecting it for generations to come."

Earthfest events will include a conversation with Adler astronomers about climate change and the screening of a documentary on light pollution.

Programs for kids include a reading of the...

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