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.

May Public Viewing Session
Our next Event...
When	Saturday, May 15, 2021 8:30 PM - 10:30 PM
Status	Tentative
Where	Sugar Grove Nature Center
What	Galaxies of the Spring Sky Our May viewing session will look at some of the many beautiful galaxies that are prevalent in the springtime. In addition, we will have telescopes set up to observe other celestial objects. With the unknown future state of the COVID-19 virus, be sure to check back here for confirmation about whether the event will be held in person
	more...

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

Welcome to the TCAA

May Public Viewing Session