A partial solar eclipse will darken the sun between 5:16 and 7:40 p.m. Sunday. Optimal viewing time is 6:33 pm.
This event is called an " annular eclipse." The last time one took place was 18 years ago. The next one visible from the mainland United States won't be until 2023.
Astronomers advise eclipse-watchers to be careful.
Start by making a do-it-yourself pinhole projector. View the eclipse by turning your back to the sun and letting the sun shine through the pinhole onto a piece of paper. From there, the progression of the moon's path can be seen.
The in Oakland will have an Eclipse Viewing Party for $5, beginning at 5 p.m.
The Lawrence Hall of Science in Berkeley will have a viewing for free on its deck, and charge $5 for activities inside. "This will be the best partial eclipse seen from Berkeley until 2045," it says says enticingly on its website. "Don’t miss it. And bring the whole family!"