The Astrophysics Group meets in the classroom at the Heritage Museum of Orange County (formerly the Centennial Heritage Museum), 3101 West Harvard Street, Santa Ana, which is just West of Fairview Avenue, between Edinger and Warner. Enter the museum driveway, which is on the West side of the museum grounds. The classroom is the small building on the right side of the row of buildings next to the parking at the back of the museum grounds, with a french door facing the parking area. Harvard Street is about 2 miles north of the I-405 freeway. If coming north from the I-405 on Fairview, Harvard is the next traffic light after Warner; if coming south on Fairview, it is the second light after Edinger.