Twin City Amateur Astronomers

Welcome to the TCAA

Welcome to the Twin City Amateur Astronomers' web site.

Located in the twin cities of Bloomington and Normal, Illinois, the TCAA was formed in 1960 to share our love of astronomy.

The purposes for which the TCAA is formed are: to promote in every way among its members and the general public an interest in, and knowledge of, astronomy and its allied sciences; to advance amateur astronomy and observational techniques; to render assistance to other individuals or organizations working in the same or related fields; and to do everything necessary and proper to further such on a formal or informal basis.

On this site you can find out about us, about our public observing sessions, held at our dark sky observatory southwest of Bloomington; our public presentations, which take place at a variety of venues usually in the Bloomington-Normal area; and even peruse our award-winning newsletter, The Observer.

Our next Event...

How-To Festival

When Saturday, July 06, 2019 10:00 AM - 1:00 PM
Status Scheduled
Where Bloomington Public Library
What On Saturday July 6th from 10am-1pm, the Bloomington Public Library will host a community event called a “How-To Festival.” At this event, attendees will have the opportunity to learn various crafts/skills/knowledge/or technologies. We are aiming to provide a wide range of topics appropriate for kids, teens and adults. The TCAA will be running a station at the festival to provide an introduction to astronomy.

We are a 501c(3) non-profit organization. All contributions are tax deductable.

Clear Sky Chart for Sugar Grove Observatory
Visitor Count