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Scientists using different methods to determine the mass of galaxies have found a discrepancy that suggests ninety percent of the universe is matter in a form that cannot be seen. Some scientists think dark matter is in the form of massive objects, such as black holes, that hang out around galaxies unseen.
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www.eclipse.net/~cmmiller/DM/
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Hot Dark Matter and Cold Dark Matter ... Tutorial on Current Status of Dark Matter ... Searches for Dark Matter Candidates...
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csep10.phys.utk.edu/astr162/lect/cosmology/darkmatter.h...
csep10.phys.utk.edu/astr162/lect/cosmology/darkmatter.html
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Dark matter has important consequences for the evolution of the Universe and the structure within it. According to general relativity, the Universe must conform to one of three possible types: open, flat, or closed.
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astron.berkeley.edu/~mwhite/darkmatter/dm.html
astron.berkeley.edu/~mwhite/darkmatter/dm.html
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The evidence suggests that the mass of dark matter in galaxies, clusters of galaxies, and the universe as a whole is about five or six times greater than the mass of ordinary light-emitting matter that makes up stars, planets, gas and dust.
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chandra.harvard.edu/xray_astro/dark_matter.html
chandra.harvard.edu/xray_astro/dark_matter.html
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Why the Universe Needs Dark Matter ... Unfortunately, the best estimates of the total mass of everything that we can see with our telescopes is roughly 0.01 M. Where is the other 99% of the stuff of the Universe? Dark Matter!
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math.ucr.edu/home/baez/physics/Relativity/GR/dark_matte...
math.ucr.edu/home/baez/physics/Relativity/GR/dark_matter.html
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Dark matter and normal matter have been wrenched apart by the tremendous collision of two large clusters of galaxies. The discovery, using NASA's Chandra X-ray Observatory and other telescopes, gives direct evidence for the existence of dark matter.
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www.nasa.gov/home/hqnews/2006/aug/HQ_06297_CHANDRA_Dark...
www.nasa.gov/home/hqnews/2006/aug/HQ_06297_CHANDRA_Dark_Matter.html
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Dark Matter is a fantastic movie. Anybody who is frustrated with academic politics or anybody who enjoys a simple movie told well, shot well and acted brilliantly, should see Dark Matter. The writer/director got it right.
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www.imdb.com/title/tt0416675/
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