A chance to join local astronomy buffs for a look at the sky through instruments, including the observatory’s 24-inch McMath classical Cassegrain telescope. Participants encouraged to bring their own telescopes. Visitors must turn off all electronic equipment (car radios, transmitters, phones, etc.) at the observatory entrance. Cancelled if sky is overcast at sunset or if the weather is extremely inclement. If in doubt, call after 4 p.m. day of event. Also, on Sept. 18 & 19 the Lowbrow Astronomers and other area clubs host the annual Astronomy at the Beach viewing night at Island Lake State Park (see glaac.org). Sunset–12:30 a.m. or as long as the sky remains clear, Peach Mountain Observatory, North Territorial. (about 1¼ miles west of Hudson Mills Metropark), Dexter. Free. (734) 975–3248.