Mount Diablo Astronomical Society

About Us

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.

Join us: become an MDAS member!

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Club Contact Info

Mount Diablo Astronomical Society
2070 N. Broadway #4889
P.O. Box 4889
Walnut Creek CA 94696
outreachinfo@mdas.net

UPCOMING EVENTS

Sat 10/19/2024
6 p.m. - 11:59 p.m. Pacific 		Society Observing -- Impromptu Night Mount Diablo - Lower Summit Parking Lot
Summit Rd Clayton, CA
Tue 10/22/2024
7:15 p.m. - 9 p.m. Pacific 		General Meeting Lindsay Wildlife Experience
1931 First Avenue Walnut Creek, CA
Sat 10/26/2024
7:30 p.m. - 9:30 p.m. Pacific 		Big Break Star Party Big Break Visitor Center
69 Big Break Rd. Oakley, CA
Sat 10/26/2024
5 p.m. Pacific 		Society Observing Mount Diablo - Lower Summit Parking Lot
Summit Rd Clayton, CA