1-2 p.m. – Stay cool at the Chattahoochee Nature Center, while learning the stars and constellations in the August night sky as you journey into STARLAB, a portable planetarium. Two, 25- minute sessions. Appropriate for ages 5 to adult. General admission: $10 for adults; $7 for seniors; $7 for students 13-18; $6 for children; free for CNC members, and kids 2 and under. 9135 Willeo Rd., Roswell, 30075. Call 770-992-2055 or go to: www.chattnaturecenter.org for information.