Madison Opera fundraiser (for Opera in the Park), 6:30-9:30 pm, 5/16, Madison Opera Center, with music by Anthony & Leslie Cao, Sachie Ueshima, silent auction, food & drinks. $150. RSVP by 5/7.
Discussing "Chasing the Stars: How the Astronomers of Observatory Hill Transformed Our Understanding of the Universe," new book. Free, but ticket required (livestream also available).