CHICAGO (AP) — 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.

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Earthfest (Credit: Adler Planetarium)

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.”

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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 book “Curious George Plants a Tree.”

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