EUGENE (GENE) CATER, EASLEY, S.C.
On the largest scales, the amount of dark matter is much greater than the amount of baryons--ordinary atoms. But on the scale of individual planets or stars, there is more ordinary matter: That's because baryons can radiate away their energy (ridding" them of heat that would fight gravity) and therefore clump move tightly under the influence of gravity than can dark matter (which can't radiate), says theorist Piero Madau of the University of California, Santa Cruz.
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|Author:||Cater, Eugene (Gene); Cowen, Ron|
|Article Type:||Letter to the editor|
|Date:||Apr 12, 2008|
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