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Old 09-15-2005, 10:48 PM   #21
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Default Re: * 'Tiger stripes' found on Saturn moon *

Exactly how much of the Universe is in the form of dark matter is a mystery & difficult to determine, obviously because it's not visible. It has to be inferred by its gravitational effects on the luminous matter in the Universe(stars and gas) and is usually expressed as mass-to-luminosity ratio (M/L). A high M/L indicates lots of dark matter, a low M/L indicates that most of the matter is in form of baryonic matter .
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