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. We love doing astronomy, and talking about it: so much so that sometimes it takes a good whack across the head to get us to shut up. Ouch!

On this site you can find out 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...

March POS - Venus and Jupiter

When Saturday, March 21, 2015 7:45 PM - 9:45 PM
Status Scheduled
Where Sugar Grove Nature Center
What Two remarkable different planets grace the current evening sky. One is hot and rocky, and the other is cold and gaseous. The contrasts between these two worlds are amazing. In addition to a short presentation, we will conduct a laser-guided sky tour and have telescopes set up for viewing.

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

Clear Sky Chart for Sugar Grove Observatory
Visitor Count