A Selective Guide to the Arts in Los Angeles

On Monday, April 6, George Preston, director emeritus of the Carnegie Observatories, talks about that stuff that covers two-thirds of the Earth’s surface and rarely falls from the sky in LA. His Carnegie Astronomy Lecture at the Huntington Library is titled “How the Earth Got Its Water.” A reception begins at 7 p.m., and the lecture starts at 7:30 p.m. in Friends’ Hall. And, unlike water, this event is free.

The next lecture in this series, focusing on NASA’s Messenger probe that has made two flybys of Mercury, is scheduled for Monday, May 20.

Huntington Library, Art Collections, and Botanical Gardens, 1151 Oxford Road, San Marino 91108, (626) 405-2100, www.huntington.org.