February 6, 2006
Dark matter comes out of the cold
Posted in Space/Science/Astronomy by Naughty Bits | Comments (0)
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Astronomers have for the first time put some real numbers on the physical characteristics of dark matter.
This strange material that dominates the Universe but which is invisible to current telescope technology is one of the great enigmas of modern science.
Astronomers cannot detect dark matter directly because it emits no light or radiation.
Its presence, though, can be inferred from the way galaxies rotate: their stars move so fast they would fly apart if they were not being held together by the gravitational attraction of some unseen material.
Such observations have established that dark matter makes up about 85% of all the mass in the Universe. Read more...
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