The CAS membership consists mainly of enthusiasts from the Northwest Indiana and Chicago metropolitan areas, but is open to anyone. The meeting dates are sometimes changed due to holidays or meeting room availability, so please check the Events page for the date and times of upcoming meetings.
Visitors are welcome to attend .
At general meetings, we have a program and other educational activities, announcements, share observing experiences, and have time to meet other members. Other than our yearly elections, no business takes place at these meetings. Visitors and members may attend but only members of the Board may participate in business. No social activities take place at these meetings. The CAS monthly meetings include programs such as guest speakers, astronomy software workshops, astro-photo contests, video presentations, swap meets, and informative lectures from CAS members.