The San Mateo County Astronomical Society purpose:

  • To establish, conduct, maintain, promote, spread and diffuse knowledge and appreciation of the science of astronomy and related subjects, fields and disciplines, by making available to the public and to the members of SMCAS equipment, facilities, lectures, various educational programs and materials.
  • To carry on, conduct, further and publish scientific research in the field of astronomy and related subjects, fields and disciplines.
  • To construct and staff with personnel, and maintain any and all necessary facilities to assist in the furtherance of the above purposes.‚Äč
  • To receive contributions of money, property, materials, services and all other kinds of assets for the furtherance of this purpose.

Our group has only one membership category, which is for the whole family. Members need not have any technical or professional qualifications, nor do they need to be knowledgeable about astronomy. Please see the membership tab for information.

NASA Space Place Recognition

SMCAS was honored for its valuable contributions to its community by NASA Space Place. See the NASA Space Place Recognition below.

NASA Certificate of Appreciation

SMCAS received a certificate of appreciation from NASA for its contribution to the 2017 Total Solar Eclipse. See the Certificate below.

  • To request a private Star Party or Astronomy Presentation, email [email protected]
  • To find out about Astronomy Events at the College of San Mateo, including Planetarium Shows and special observing events, visit the CSM page linked here.
  • To receive emails about astronomy lectures and events in the Bay Area, join the BayAstro Groups.io.


Ed Pieret

SMCAS Vice President

(650) 862-9602

Mailing Address


PO Box 974, Station A

San Mateo, CA 94403