A computer simulation depicting a large chunk of our universe
G. L. Bryan, M. L. Norman, UIUC, NCSA, GC3
A Matter of Scale - interactive showing the sizes of things, from very tiny to huge - from NSF
Cosmology is the study of the whole universe. Just what is the Universe? Well, it is everything that exists. However, from Earth we cannot see everything in the Universe. Some things are dark (brown dwarf stars, planets, and Dark Matter) and we cannot see them. And because light travels at a set speed we actually look back in time
when we look into the cosmos.
Astronomers see some neat structure in the Current Universe. That structure can tell us much about the History of the Universe. It can also tell us what we can expect for the Future of the Universe and beyond...
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