Constellations of both summer and fall will be sparkling highlights of the last star party of the season, sponsored tonight by the Salt Lake Astronomical Society.

"You will be able to see some of the summer constellations low in the western sky, such as Sagittarius and Hercules, as well as some of the constellations just rising in the east," said Ann House, the group's vice president. The prominent formations include Perseus, named after the killer of the monster Medusa, and Pegasus, the flying horse.

House said the events are free, open to the public, and subject to cancellation if the weather doesn't cooperate.

The party tonight is at Stansbury Park, Tooele County, using the society's Stansbury Park Observatory Complex (SPOC). Directions are available on the society's Web site.

Beginning at 7:15 p.m., House will present a program titled "The Search for Exoplanets." Exoplanets are planets outside our solar system. The lecture will include hands-on activities for children and adults.