Club Contact Info
Mount Diablo Astronomical Society
2070 N. Broadway #4889
P.O. Box 4889
P.O. Box 4889
Walnut Creek CA 94696
Welcome to 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.
We invite you to attend our monthly meetings. Experience outstanding speakers and conversation with friendly astronomy enthusiasts.
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Tue 6/16/2026
11 a.m. - 1 p.m.
Pacific
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Pleasant Hill Library Exploration Stations
Pleasant Hill Library 2 Monticello Ave Pleasant Hill, CA |
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Sat 6/20/2026
8 p.m. - 11 p.m.
Pacific
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Public Astronomy Program: The Moon - Earth's Lost Rock!
Mount Diablo - Lower Summit Parking Lot Summit Rd Clayton, CA |
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Tue 6/23/2026
7:15 p.m. - 9 p.m.
Pacific
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General Meeting
Lindsay Wildlife Experience 1931 First Avenue Walnut Creek, CA |
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Sat 7/11/2026
10:30 a.m. - noon
Pacific
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Oakley Library's Summer Reading Party
Oakley Library 1050 Neroly Road Oakley, CA |