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...

Partial Solar Eclipse Viewing

When Thursday, October 23, 2014 4:30 PM - 7:00 PM
Status Scheduled
Where Sugar Grove Nature Center
What The Twin City Amateur Astronomers will host an observation of a partial solar eclipse to be held in the remote parking, just north of Sugar Grove Nature Center. The club will have a number of safe observing methods available, using telescopes and other instruments. The eclipse will begin about 4:49 p.m., with the maximum eclipse occurring at about 5:46 p.m. At this time, the moon will cover about 41% of the sun’s diameter. We should also be able to see Venus. Participants are welcome to come anytime during this event. We will plan to have this event unless the sun is not visible due to clouds or rain.

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

Clear Sky Chart for Sugar Grove Observatory
Visitor Count