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Twin City Amateur Astronomers
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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...

September Public Observing Session

When Saturday, September 27, 2014 7:15 PM - 9:15 PM
Status Scheduled
Where Sugar Grove Nature Center
What Globular Clusters These are the oldest star clusters in the Milky Way, and only about 140 are known. They pre-date the appearance of the rest of our home galaxy and are an amazing sight even in small telescopes.
more...

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

Clear Sky Chart for Sugar Grove Observatory
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