Join the Physics and Astronomy Department at our viewing nights.These events are open to the public. Follow the signs from the freeway to the campus. The Observatory is located inside the stadium area at the southeast corner of the campus (East Cotati Avenue and Petaluma Hill Road, 2 miles east of U.S. 101 at Cotati). Check the weather and this site before coming if it appears possible that clouds or fog may force cancellation. For more information, email PAdept@sonoma.edu.