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Welcome to the Mount Diablo Astronomical Society

M.D.A.S. was formed in 1957 as part of the National "Moonwatch" program established to time the first man-made satellites so accurate orbits could be calculated.

Within months of the club's formation, astronomy and space science made a giant leap into the households and classrooms of Americans with the launching of Sputnik, and soon afterwards Explorer I. The space race was on, kindling a desire in many to understand more about space and astronomy, and what the newly formed NASA was planning. We hold monthly meetings in Walnut Creek, CA, as well as Public and Society Astronomy Programs on Mt. Diablo and the surrounding area.

MDAS provides astronomy outreach to the public free of charge at one of the premier viewing locations in the San Francisco Bay Area, Mount Diablo State Park.  Our monthly (March to October) star parties feature many telescopes and binoculars provided and operated by our members for your education and enjoyment.  We also provide outreach events for organizations located in the San Francisco East Bay cities of Alamo, Antioch, Concord, Clayton, Danville, Dublin, Lafayette, Moraga, Orinda, Pleasant Hill, Pleasanton, and Walnut Creek, as well as unincorporated areas of Alameda and Contra Costa Counties.  Our members are associated with and have also done outreach with the Espace Academy, other museums, such as Chabot Space and Science Center, Lawrence Hall of Science, and some of great community programs with MDIA, MDOA, East Bay Parks, Muir Heritage Society, Livermore Unit of the National Association of Rocketry (LUNAR), Girl Scouts, Boy Scouts, Venture Scouts, Cub Scouts. Elementary School, Middle School, High School, and College.

We hold our monthly meeting on the fourth Tuesday of the month (January to October, third Tuesday in November) at:
Lindsay Wildlife Experience in the Manzanita Room
Address: 1931 First Avenue
Walnut Creek, CA 94597

We have speakers on topics covering space science, astronomy, historical astronomy, space astronomy, telescopes and night sky viewing,  Our speakers are from some of the local universities and colleges , Lawrence Livermore Laboratories, NASA, and other public organizations and private businesses.

Club Store Information

Our MDAS Store (found under "Club Stuff") is where you can place orders for initial memberships, renewals, and order other club items, including a link to renew your Astronomy or Sky and Telescopes Subscriptions (at a discounted rate). See the new link in the left-hand frame labeled "Club Stuff".

If you are traveling and looking for clubs and events in other areas, or would just like to see what else is going on in our area, you can use the following Find Astronomy Events and Clubs(USA) control: City: State: choose one Alabama Alaska Arizona Arkansas California Colorado Connecticut Delaware Florida Georgia Hawaii Idaho Illinois Indiana Iowa Kansas Kentucky Louisiana Maine Maryland Massachusetts Michigan Minnesota Mississippi Missouri Montana Nebraska Nevada New Hampshire New Jersey New Mexico New York North Carolina North Dakota Ohio Oklahoma Oregon Pennsylvania Rhode Island South Carolina South Dakota Tennessee Texas Utah Vermont Virginia Washington West Virginia Wisconsin Wyoming District of Columbia Puerto Rico Zip: Clubs Events Get this Widget

Member Information MDAS Royal Blue Jackets may now be ordered from the Website, click here for ordering information. MDAS Historical Paper: Click here for Jerry Hudson's� History of the club�s formation. MDAS Bylaws: click here. MDAS Resolutions: click here.