Dark matter
Revision as of 15:54, 1 February 2013 by Ted C (talk | contribs) (Created page with "'''Dark matter''' is any matter that is not visible from Earth because it is neither luminous nor illuminated. A black hole is an example of dark matter: no light escapes...")
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Dark matter is any matter that is not visible from Earth because it is neither luminous nor illuminated. A black hole is an example of dark matter: no light escapes from it, so it can not be seen directly, but its existence can be inferred from its gravitational effects on visible bodies.