The Chicago Astronomical Society is the oldest astronomical society in the western hemisphere, started in 1862. To this day, CAS continues to further its mission by maintaining an observatory, offering numerous venues for public outreach, conducting public observing sessions, and hosting monthly meetings and lectures. CAS also puts on two annual festivals each year: the Earth, Wind & Sky Festival and Astrofest. Click on the links to the left for more information about each of these.

History

The Chicago Astronomical Society (CAS) was founded by scholars, and leaders in the arenas of business and politics in 1862 to advance the scientific knowledge of astronomy.  The founders knew that a primary step in their mission was to build an observatory from which to conduct original research in the field. Inquires were made and the prime telescope maker in the United States was identified. A lens was bought and an observatory established. more...

  • Astrofest 2009
    09/25/2009 - 12:00pm
    09/27/2009 - 12:00pm

    Astrofest 2009 will be held September 25-26, 2009 at Vana's near Kankakee, IL.  The theme for this year's event is "International Year of Astronomy."  As in the past, we will have an impressive lineup of speakers and a lot of telescopes for night observing. 

  • THE JULY 2009 GENERAL MEETING OF THE CHICAGO ASTRONOMICAL SOCIETY
    07/10/2009 - 7:00pm
    07/10/2009 - 9:00pm

    THE JULY 2009 GENERAL MEETING OF THE CHICAGO ASTRONOMICAL SOCIETY
    Friday Evening July 10th, 2009 at 7:00 P.M. at Cernan Earth & Space Center

    ANCIENT MYSTERY ON A PERUVIAN PAMPA

  • THE JUNE 2009 GENERAL MEETING OF THE CHICAGO ASTRONOMICAL SOCIETY
    06/12/2009 - 7:00pm
    06/12/2009 - 9:00pm

    THE JUNE 2009 GENERAL MEETING OF THE CHICAGO ASTRONOMICAL SOCIETY
    Friday Evening June 12th, 2008 at 7:00 P.M. at the Adler Planetarium

    Three for one: CAS ELECTIONS, SOLAR MASS EJECTIONS, and THE CAS BECKER OBSERVATORY

     

    CAS Annual Elections

  • Litte Red School House 2009 Summer Skywatch Schedule
    05/02/2009 - 8:00pm
    10/24/2009 - 7:00pm

    THE CHICAGO ASTRONOMICAL SOCIETY’S
    2009 Little Red School House SUMMER SKY WATCH SCHEDULE

    *** Due to construction at the Little Red School House, we have temporarily moved the observing to Lake Katherine Nature Center in Palos Heights ***

  • Cernan Earth and Space Center 2009 Skywatch
    05/02/2009 - 7:30pm
    12/05/2009 - 7:30pm

  • THE MAY 2009 GENERAL MEETING OF THE CHICAGO ASTRONOMICAL SOCIETY
    05/08/2009 - 7:00pm

     

    Friday Evening May 8th, 2008 at 7:00 P.M. at the Adler Planetarium

    "In search of our universe's missing mass and energy"
    Daniel Hooper

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