Presentations on astronomical topics. The observatory’s 3 main telescopes will be open for viewing. $5–$10. Ages 11 & younger: free. Parking: $10. 8–11 p.m. ID & proof of COVID-19 vaccination or negative test 48 hrs. prior required. Sugarloaf Ridge State Park. Robert Ferguson Observatory. 2605 Adobe Canyon Rd., Kenwood. rfo.org.