A 501(c)(3) tax exempt social and education organization


Welcome to the Sonoma County Astronomical Society


We meet quarterly (March, June, September, and December) at 7:00 PM. Please check our calendar for the meeting location.

Each meeting features a guest speaker, observing highlights and club news.

Visitors and Guests are welcome free of charge.


One of the best features of each SCAS General Meeting is the break before the
program during which members and guests enjoy Astronomy conversation.

Who We Are

Our membership consists of astronomy and science enthusiasts of all ages, both amateur and professional.

About SCAS

SCAS was founded in 1974 and has about 150 members from all walks of life. We share a common interest - our love of astronomy.

We are supporting members of the Robert Ferguson Observatory, the Night Sky Network, the International Dark-Sky Association and the Astronomical League.

The purpose of the club is to:

Join us! See our Membership Page for details.

School Astronomy Nights

These are held on request of schools in Sonoma County. We provide an introductory in-class PowerPoint presentation, and several club members bring telescopes to the school for night sky viewing. There is no charge for a School Astronomy Night, but they are on a "first come, first served" basis.

Contact Activities@sonomaskies.org for more information.

Striking Sparks Telescope Awards Program and Young Astronomers

One of our goals is to fuel the imagination of young people. Each year students submit essays explaining why they want a telescope. Telescopes are awarded to those entering the best essays.

Fall is the time to start thinking about your essay, attend meetings and star parties. See our Striking Sparks page for more information and How to Enter.

To further support youthful star-gazers, SCAS encourages our Young Astronomers to join us at the Robert Ferguson Observatory and to participate in local star parties. See the Young Astronomers page to learn more.

We really appreciate the role teachers play by nominating students and evaluating their essays. We could not
do this program without teacher support.

2011 AwardNews, Newsletters, and BLOG

See why folks enjoy our award-winning newsletter Sonoma Skies - Voted "Outstanding Astronomy Newsletter" by the Astronomical League

Follow SCAS on Facebook

Read and Comment on our BLOG

Arrange to meet with other members for observing and post observing logs in our Yahoo group.

Astronomy Links

Sonoma County and Bay Area Organizations:

See our Links page for: