...to promote the interest in and advance the knowledge and understanding of astronomy,
the most ancient and the noblest of the physical sciences.
Member Challenge!
Our Webmaster is seeking a panoramic photo of the Chicago Skyline or a night view over the lake, including the Adler Planetarium, for use in the soon-to-be updated CAS website. Submissions must be made by members only, of photos they have themselves taken. The winning photo will be used, and properly attributed to the photographer, ensuring lasting glory and bragging rights for years? to come. Please send submissions to the Webmaster


Regular meetings are held once a month

Dates may vary depending on facility availability.
Usually at 7:00 PM at the Adler Planetarium
or sometimes at Triton College.
 Check our Meeting Schedule &
Hubble Lecture Series Sponsorship .

Information? Comments? Questions?
 E-mail us (click here)
or write us at
 Chicago Astronomical Society
P.O. Box 30287
Chicago, IL 60630-0287

We are now a Meetup Group. 
Click here
to access and join Meetup.

The Chicago Astronomical Society is proud to be a certified member of the Global Star Park Network (One Star at a Time).
Click Here for Certificate . 
Click here for brochure .
 Click here for One Star web site.

The Chicago Astronomical Society is a proud member of the Astronomical League .
( astroleague.org )

The Chicago Astronomical Society
is part of the

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Note to our visitors:
The Chicago Astronomical Society is an educationally-oriented child-safe site. We support advancement in the science of astronomy and astrophysics. This site is registered with the following ratings organization to help protect our children from inappropriate material:

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