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The Cosmos

Cosmology is the study of the overall structure of the universe. And just what is the Universe? Quite simply, it is everything that exists. However, from Earth we cannot observe everything in the Universe. Some things are dark (brown dwarf stars, planets, and Dark Matter) and we cannot see them. Additionally there are parts of the universe whose light has not yet reached us in this part of the Universe. The observable universe is the Universe that reveals itself through electromagnetic radiation that can be detected on Earth.

Looking Back in Time The Current Universe The History of the Universe The Future of the Universe

A computer simulation depicting a large chunk of our universe
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Image Courtesy of G. L. Bryan, M. L. Norman, UIUC, NCSA, GC3

Back to the Universe

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Copyright 1995, 1996, 1997 The Regents of the University of Michigan