The San Mateo County Astronomical Society is dedicated to bringing the wonders of space and astronomy to the residents of San Mateo County.

We are glad you stopped by.

Please join us at one of our upcoming events.    All of our star parties, presentations, and meetings  are free and open to the public. 

SMCAS was honored for its valuable  contributions to its community by NASA Space Place: 

Click here to see certificate

San Mateo County Astronomical Society Upcoming Activities​