The ChesMont Astronomical Society (CAS) has operated in Chester County and Montgomery County area in Pennsylvania since 1986. We are dedicated to observing the night sky and educating the public about the wonders of the universe through outreach events.

We meet monthly, on the Sunday evening closest to the full moon, at 7pm at the Crow’s Nest Preserve (see map) in Elverson, Pennsylvania.

Do you want to know more?

Take a look at our events – you can move between months and clicking on an event will bring up more details. All events are open to the public.

Take a look at our forums where we often discuss observing plans and astronomical news.

Go to the About Us page to learn more about our club’s history

Interested in participating in club activities? Register for an account, post in the forums and take a look at the Membership page for more information.