CRANBERRY TWP — The Cranberry Artists Network is sponsoring a Martinis with Monet Art Expo July 10 to Aug. 19 at the Cranberry Township Municipal Center, 2525 Rochester Road.

The open show, meaning artists do not need to belong to the network, benefits the Cranberry Township Community Chest and helps kick off Cranberry Township Community Days.

The juror for this year's event is Kimberly Koller-Jones, executive director/CEO at the Hoyt Center for the Arts in New Castle.

The exhibition's grand opening is 7 p.m. July 10, when awards will be announced.

Tickets for the opening are available in advance at www.ctcchest.org or in person at the municipal center administration office.

For more information, visit www.cranberryartistsnetwork.com.

MARS — Mars Exploration Celebration Days are planned May 31 through June 2 in downtown and will be larger than in the past.Activities will include exhibits, speakers, a costume contest, entertainment, a kids' zone, food and a brewfest.For more information, visit MarsNewYear.com.

PITTSBURGH — The Sen. John Heinz History Center will offer free admission to veterans and active military Saturday, Sunday and Monday for the Memorial Day weekend.The center is the site of “The Vietnam War: 1945-1975” exhibition.The exhibit uses photography, artifacts and more than 20 audio/visual displays to tell the personal stories of those who were impacted by the war, from the homefront to the front lines.Visitors can peer into the cockpit of the exhibit's largest and most iconic artifact: a “Huey” helicopter used by the U.S. Army from 1967-1970.A Memorial Day flag folding will take place at noon Monday.For more information, visit HeinzHistoryCenter.org.

FRAZIER TWP, Allegheny County — The Amateur Astronomers Association of Pittsburgh will host star parties that start at 8:45 p.m. June 7 and 8 at the Nicholas E. Wagman Observatory in Deer Lakes Regional Park near Russellton.The parties are held weather permitting. Call 724-224-2510 for more information.

SHARON — Three days of music and dancing are planned for the 13th National Button Accordion Festival Friday through Sunday at the Apollo Maennerchor, 291 S. Dock St.Hours are 5 to 10 p.m. Friday, noon to 10 p.m. Saturday, and 12:30 to 9 p.m. Sunday.This is billed as the largest button accordion festival in the country, and players come from all over the country to play.Free polka dance lessons are being offered at 10:30 a.m. Saturday.Visit www.nationalbuttonaccordionfestival.com for more information.

Pittsburgh — The National Avery presents "Living Dinosaurs" Saturday through Sept. 29, showcasing birds as the living descendants of dinosaurs. The exhibit unveils a pterosaur sculpture, introduces real dinosaur fossils and touchable replicas, and offers new educational dinosaur-themed activities for children.