“Iterations: Rhythm & Reason” : Through Jan. 31 at Peg’s Gallery, 53 First St., Hudson. Works by Peter Christian Johnson, Janice Lessman-Moss and Brinsley Tyrrell. pegsgallery.org .

Long Time Gone: Tribute to Crosby, Stills, Nash & Young: Noon Oct. 19 at Music Box Supper Club and Concert Hall, 148 Main Ave., Cleveland. musicboxcle.com .

The Astronomy Club of Akron : 2 p.m. Oct. 19 at the Kiwanis Civic Center, 725 Portage Lakes Drive, New Franklin. Dr. Jay Reynolds of Cleveland State University will give a presentation on stars. acaoh.org.

The Friends of Richfield Heritage Preserve History Hike : 2-4 p.m. Oct. 19 at 3771 Oviatt Road. Lynn Richardson will lead the free hike. Reservations are requested at eventbrite.com.

Neil Zaza's One Dark Night : 7 p.m. Oct. 19 at Akron Civic

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