Posted on April 22, 2017April 22, 2017 by administratorAdler Planetarium Earth Day Free April 22, 2017 Earth Day! Free Admission for Illinois Residents Today at the Adler Planetarium http://www.adlerplanetarium.org/events/earthfest-2017/?gclid=CjwKEAjw_uvHBRDUkumF0tLFp3cSJACAIHMYfKZ5Vv0t4o2LxLxDJHacbm0qjjQ2-M1esgDIPCrI7xoC3xvw_wcB