The Peninsula Astronomical Society (PAS) is a group of San Francisco Bay Area astronomy enthusiasts of all ages, backgrounds, and experience. Some members are professionally trained in astronomy, others are just starting and have never looked through a telescope before (though that doesn’t last long!). One thing that we all have in common is an interest in the sky.


The PAS generally holds its meetings on the second Friday of each month at 7:30 pm, either on the campus of Foothill College (between San Jose and Palo Alto) in Los Altos Hills, or at the Los Altos Public Library. Each meeting features a speaker (or speakers) bringing us up to date on different topics in astronomy.

There is no charge to attend, and the public is welcome and encouraged to join us for these meetings. Note, however, that there is a $3 charge for parking at Foothill College. Visitor parking permits are available from machines throughout each parking.  Note: Please do not park in spaces marked “Staff” – you will be ticketed!



As part of its commitment to bringing astronomy to the public, the PAS operates the Foothill College Observatory. The Observatory is staffed by members of the society who volunteer to conduct regularly scheduled public programs.

More on the Foothill Observatory page.


In addition to operating the Foothill Observatory, the PAS has its own observatory in the nearby Santa Cruz Mountains. The Oakridge Observatory location has AC power and room for members to set up their own telescopes at our frequent star parties. This site is also the home of the society’s 12″ telescope, available for member use after a checkout. The Oak Ridge site is available only to current PAS members that have a signed “Oak Ridge Disclaimer” on file and have paid the $18 annual use fee.

Details on the Oakridge Observatory page.


Regular annual PAS membership is $25 per year, with options for Junior and Lifetime memberships.

Get the details and sign up on the PAS Membership page.

Mailing Adress

Peninsula Astronomical Society
PO Box 4542
Mountain View, CA 94040

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