BUTLER TWP — Musical Theatre Guild presents the music of ABBA in the musical “Mamma Mia” Friday through Sunday at the Succop Theater at Butler County Community College.

Curtain is at 7:30 p.m. Friday and Saturday and at 3 p.m. Sunday on the main campus.

Tickets are $17, available at www.mtgbutler.org.

A Butler Ghost Walk is planned for Oct. 18, 19, 25 and 26 departing from Butler County's Diamond Park, which is across from the Butler County Courthouse.The evening starts at 7:30 p.m. with host Bill May.Participants will hear of the ghosts of Sam Mohawk, Ghosts of the Old Hospital, The Haunted Elevator, The Chinese Laundry Murder, The Phantom Civil War Regiment, and The Girl Who Heard the Angels Sing.The presentation will include a photo of “The Ghost of the Penn Theater.”Reservations are required and can be made by calling 724-256-9026 or by visiting ButlerGhostWalk.com. Cost is $15 per person.

ZELIENOPLE — The 35th Zelienople Country Fall Festival across the borough.Hours are 9 a.m. to 7 p.m. Saturday and noon to 5 p.m. Sunday.Music will include performances by the Butler Notables barbershop chorus, Banjo All Stars, and accordianist Wally Merriman.There will also be a car cruise, chili cook off, crafts and food, among other activities.

Maridon Museum will be the site of a discussion on the “Tibetan Book of the Dead” at 6 p.m. Oct. 24 at the museum, 322 N. McKean St.Presented by Cynthia Marshall, the discussion will cover the ancient text that describes how the living can break the cycle of death and rebirth.The program is free, but donations will be accepted.Reservations are required. Call 724-282-0123.

PITTSBURGH — The Mendelssohn Choir of Pittsburgh features many members from Butler County among the group's more than 100 voices.They include Holly Furman and Robin Schmeider, both of Butler; Earle Ashbridge, Anna Shoenthal and Mike Thompson, all of Mars; Norrie Bastedo, Edward Jaicks and Matthew Soroka, all Cranberry Township; and Liana D. Alksinite Lloyd of Zelienople.The 2019-20 season begins with excerpts from a world premiere by Stewart Copeland of The Police on Oct. 23 at Mr. Small's Theater in Millvale.The event will include a live, on-stage conversation with the former rock drummer.The world premiere of Satan's Fall will be presented by the Mendelssohn Choir of Pittsburgh (MCP) February 7 and 8, 2020 at the newly restored Roxian Theatre, a mid-size rock venue in McKees Rocks,“Satan's Fall,” a commissioned work for large chorus by Copeland, will be performed in its entirety on Feb. 7 and 8 at the newly restored Roxian Theatre in McKees Rocks.More information and tickets are available at www.themendelssohn.org.

PITTSBURGH — Starting Oct. 19 at Phipps Conservatory and Botanical Gardens, visitors can embark on a journey through this year's fall flower show, “Japanese Inspirations.”The three-week-only exhibit celebrates Japan's festivals and botanical design, featuring hundreds of vibrant blooms in dramatic cascades, giant disbuds and other forms.The show will continue through Nov. 10.Hours are 9:30 a.m. to 5 p.m. daily and until 10 p.m. on Fridays.Admission is $17.95 for adults, $16.95 for senior citizens and students and $11.95 for children ages 2 to 18.Learn more at phipps.conservatory.org/Fall.

PITTSBURGH — The Pittsburgh Youth Symphony Orchestra has slated four concerts for its 2019-20 season.Concerts are planned at 7:30 p.m. Dec. 8 at Heinz hall, at 3 p.m. Jan. 19 at Shadyside Presbyterian Church, at 4 p.m. March 22, and at 2 p.m. May 9 at Heinz Hall.For ticket information, pyso.org.

FRAZER TWP, Allegheny County — See large clusters of stars, colored double stars, and the planets Jupiter, Saturn, Uranus and Neptune during the October Dark Sky/Moonrise Star Party sponsored by the Amateur Astronomers Association of Pittsburgh.The party starts at about 6:45 p.m. Oct. 19 at the Nicholas E. Wagman Observatory, Deer Lakes Regional Park, near the village of Russellton.The event is held weather permitting. Call 724-224-2510 for more information.

PITTSBURGH — Featuring 40 real human and animal mummies and 85 related artifacts from all over the globe, “Mummies of the World: The Exhibition” is open at the Carnegie Science Center.The exhibit provides a window into the lives of ancient people from every region of the world including Europe, South America, and Ancient Egypt, offering unprecedented insights into past cultures and civilizations.Included are a mummified family from Hungary, a mummified German nobleman found in the crypt of a 14th century castle, and South American shrunken heads.“Mummies of the World” continues through April 19. Tickets are separate from Science Center's regular admission.Tickets are available at CarnegieScienceCenter.org.

SLIPPERY ROCK — The newest work by playwright and director David Skeele, a professor at Slippery Rock University, will premiere Friday and run through Oct. 17 in the University Union MPR on campus.A collaborative effort between the performers of SRU's theatre program and bluegrass trio Well-Strung, “Medea in Methland” will offer audiences an immersive experience in a drama of Greek proportions, set in an Appalachian holler.Curtain is at 7:30 p.m. Friday and Saturday and at 2 p.m. Sunday, as well as 7:30 p.m. Oct. 15 to 17.Tickets are $12 for SRU students with ID and $14 general admission.For tickets, visit www.sru.edu/tickets.This production is recommended for mature audiences.