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Astrophysical Journal (Chicago)
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Astro-Physics Inc. (Rockford)
Introduction to the Cosmic Microwave Background (Chicago)
Basic explanations of key concepts related to the cosmic background radiation, including the big bang models of an expanding universe and the ripples in the density of the early universe that led to the galaxies and stars that can be seen today. By Wayne
Lake County Astronomical Society (Lake County)
Lake County Astronomical Society
Naperville Astronomical Association (Lombard)
Amateur astronomy club in the southwest-suburban area of Chicago, Ill., USA. Information on free public programs and sessions at our observatory; other resources for the amateur astronomer.
Planetary Studies Foundation (Crystal Lake)
Thursday, August 21, 2003 at 9:00pm. Join us for a memorable evening observing Mars as it comes the closest to Earth in 26,000 years.
Popular Astronomy Club (Rock Island)
Sangamon Astronomical Society (Springfield)
Twin City Amateur Astronomers (TCAA) (Bloomington)
For nearly 50 years,the Twin City Amateur Astronomers has been sharing our love of astronomy. We are located in the twin cities of Bloomington and Normal, Illinois,