Astronomy Club of Southern Maryland

A group of residents of Calvert County and its neighboring areas with a common interest in amateur astronomy.

ACSM Welcomes You

The Astronomy Club of Southern Maryland (ACSM) is an informal club whose members are enthusiastic about observing the night sky with amateur telescopes. We enjoy learning more about our universe, and frequently share our hobby with the public at outreach sessions at a number of venues in our area.

The Club holds regular monthly meetings, and occasional group outings.  Our meeting site is the Jefferson-Patterson Park & Museum near St. Leonard, Maryland, USA.

2019 Transit of Mercury at North Beach, MD
lasers spelling out ACSM
Comet NEOWISE July, 2020
viewing the Sun
Exhibit table
Andromeda galaxy and Perseus
Club meeting at Jefferson-Patterson
Pointing out Pleaides
Outreach in Prince Frederick
Rebuilt Optical Craftsman 10-inch
NHS folks at observatory
twilight at JPPM


The ACSM has resumed monthly observing sessions at Jefferson-Patterson Park and Museum, with restrictions. We set up socially-distanced at the King's Reach Field, and ask participants to only use their own optics - no sharing out of an abundance of caution.

If we can help you with telescope questions, observing suggestions, or other astronomy-related concerns, please contact Tom via email. We'll be happy to provide whatever assistance we can.

Family Astronomy Night at Fairview Branch of Calvert Library

Interested in our Club?

Come explore the night sky with us and discover its many wonders. Learn how to choose, set up, and use telescopes and other amateur astronomy gear.

Interested persons are welcome to drop in at an upcoming Club meeting and see what we're all about.  Check our meetings page for details.

For more information call 301-602-5251 or email for details.

working with home-schooled students