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Is It Time to Discard the Whole Dark Matter Contrivance?
Posted by Guy Pirro on 10/14/2016 9:12 AM
In the late 1970s, astronomers Vera Rubin and Albert Bosma independently found that spiral galaxies rotate at a nearly constant speed. The velocity of the stars and gas inside a galaxy does not decrease with the radius, as one would expect from Newton's laws and the distribution of visible matter. Rather, it remains approximately constant. For lack of a better explanation, such "flat rotation curves" have generally been attributed to a mysterious, invisible, and still undetected dark matter surrounding these galaxies, which provides the additional gravitational attraction required to balance everything out. Now a team led by Case Western Reserve University researchers has found a significant new relationship in spiral and irregular galaxies -- The acceleration observed in rotation curves tightly correlates with the gravitational acceleration expected from the visible mass only. This new work challenges the current understanding (and possibly even the existence) of dark matter.
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