Sacramento Valley Astronomical Society (SVAS)
A Sacramento-area nonprofit astronomy club, founded in 1945, that runs School Star Parties bringing filtered telescopes to schools within 30 miles of Sacramento for daytime solar viewing and evening presentations, plus monthly member star parties and a community-college astronomy/physics scholarship.
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Eastbay Astronomical Society
A nonprofit amateur astronomy club founded in 1924 and based at Chabot Space & Science Center in Oakland, offering a discounted student membership with a telescope loaner program, a Telescope Makers' Workshop, and members-only viewing nights on Chabot's historic telescopes.
San Jose Astronomical Association (SJAA)
A San Jose-based amateur astronomy club whose Quick STARt program pairs new members, including students, with loaner Dobsonian telescopes and hands-on instruction in stargazing basics, alongside a school star party program that brings telescopes and volunteer astronomers to campuses.
Peninsula Astronomical Society – Foothill Observatory
An all-volunteer Bay Area astronomy club that operates the public Foothill Observatory on the Foothill College campus, hosting free Friday-night stargazing and Saturday-morning solar viewing through a 16-inch computer-controlled telescope, plus member talks and star parties.
Robert Ferguson Observatory – Young Astronomers Program
A free monthly astronomy club for students from 4th grade through high school, meeting virtually on the first Friday of each month to review the current sky, rocket launch updates, and a rotating astronomy topic, with occasional in-person gatherings at the Observatory and Sonoma County libraries.
Silicon Valley Astronomy Lecture Series
A free public lecture series founded in 1999 at Foothill College featuring leading astronomers, including Nobel laureates and National Academy of Sciences members, presented six Wednesday evenings each academic year and co-sponsored by the Astronomical Society of the Pacific, SETI Institute, and UC Observatories.
Chabot Space & Science Center — Galaxy Explorers
Year-long Oakland teen program training students to lead planetarium shows/demos.