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.

July Public Observing - Total Solar Eclipse
Our next Event...
When	Saturday, July 29, 2017 9:00 PM - 11:00 PM
Status	Scheduled
Where	SGNC
What	The Total Solar Eclipse of August 21st A solar eclipse occurs when the Moon crosses over the face of the sun and the moon’s shadow strikes the Earth's surface. This summer’s total solar eclipse will cause one of the most majestic natural wonders that most people will see during their lifetimes, and Illinois is the place to be to see it. In addition to our presentation, we will have a laser-guided sky tour and telescope observing.
	more...

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

Clear Sky Chart for Sugar Grove Observatory

Welcome to the TCAA

July Public Observing - Total Solar Eclipse