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3 cups


3 cups


1½ cups


The Mount Diablo Observatory Association (MDOA) is dedicated to public education in astronomy. The organization includes scientists, engineers, and other professionals with a common interest in astronomy and a desire to further science education.

Mt. Diablo Observatory Association, Inc.
P.O. Box 3165
Walnut Creek, CA 94598-3165

In celebration of the International Year of Astronomy 2009, NASA Great Observatories -- Hubble Space Telescope, Spitzer Space Telescope, and Chandra X-ray Observatory -- have produced a matched trio of images of the central region of our Milky Way.

Stargazing on Mount Diablo
The Mount Diablo Observatory Association, Inc. (MDOA)

is a cooperating organization within Mount Diablo State Park. Incorporated in 1988, MDOA members planned, raised funds and established an astronomical observatory.


The observatory consists of a Solar powered 96 square foot roll-off roof observatory, and a 500 square foot warming room. The heart of the observatory is a computer controlled Celestron 14, which has a variety of electronic attachments, a CCD camera, and photographic equipment. The addition of a refractor to the observatory has enhanced the photographic tasks and the public outreach of the observatory. A 15 Kilowatt generator provides all the electrical needs for lighting, heating, and AC for the comfort of our visitors in the warming room.

At nearly 3800 feet above the mean sea level, the observatory has an unobstructed view of the night sky (and Mount Diablo is the highest mountain within the San Francisco Bay Area with a public access observatory).

Every year MDOA and its sister organization, Mount Diablo Astronomical Society, operate Public Astronomy Programs under the sponsorship of Mount Diablo State Park. This program is now in its 28th year!

For written information, applications for Associate Membership ($30/year; $25 annual membership + $5 MDAS name badge) to support the observatory or for other correspondence feel free to contact us by email,

or in writing at:

Mount Diablo Astronomical Society

P.O. Box 4889

Walnut Creek, CA 94596

Celestron 14 | Jon Wilson

Planetary Nebula, M 57 in Lyra. June 12, 2010

Information for Visitors:


MOON Photographed April 13, 2009

Participate in hands-on astronomy activities followed by supervised observing through the many different telescopes of MDAS members.

Bring snacks, water, binoculars, and warm clothes. If you bring a flashlight please cover it with red material.

Please note that only Mount Diablo Astronomy Docents may set up telescopes on Public Nights.


Mount Diablo, at the Lower Summit Parking Lot off Summit Road, almost to the top of Mount Diablo

Summit Rd, Walnut Creek, CA 94598

More information at: Mount Diablo Astronomical Society

Another astronomy link: Western Amateur Astronomers

The material above is provided by Mount Diablo Observatory Association 
and Mount Diablo Astronomical Society

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