About Us

Evening programs are held one Saturday each month, April through October. A talk by a professional astronomer, physicist, or space scientist begins in the Mountain Theater (Map and Directions) starting at 7:30 pm and lasts about 45 minutes. These presentations are typically enhanced by beautiful images projected on a large screen. The audience is invited to ask questions at the end.

Following the presentation, audience members are invited to the Rock Spring parking lot area for a brief Night Sky Laser Tour by a member of the San Francisco Amateur Astronomers highlighting the prominent constellations, stars and planets visible in the night time sky, then to view through SFAA-provided telescopes. The observing session (or “star party”) lasts until 9:45 pm.

Special Thanks

We thank and greatly appreciate the support of the San Francisco Amateur Astronomers (SFAA), who conduct telescope clinics and provide telescopes for public viewing at Mt Tam Astronomy events.

Viewing Etiquette

The observing sessions are courtesy of the San Francisco Amateur Astronomers. The equipment is the personal property of the members. Please do not handle or adjust any equipment without the explicit permission of the owners. White light ruins dark adeptness, so please use only filtered (preferably red) light around the telescopes. (The greeters in the Mountain Theater have filters and loaner flashlights for those who do not bring their own.) The observing sessions end at 9:45 pm to allow all cars time to be off the mountain by 10:00 pm.

YouTube Videos

Videos of some programs are available on our YouTube Channel.

Contact Information

• Use the Contact form

• Email: Contact@MtTamAstronomy.org

• Address:
  Friends of Mt Tam
  Attn: Mt Tam Astronomy Programs
  P.O. Box 7064
  Corte Madera, CA 94976-7064

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