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"A Cosmic Conundrum"
A simple survey yields a cosmic conundrum.
Public release date: 31-Jul-2006 "Santa Cruz, CA -- A survey of galaxies observed along the sightlines to quasars and gamma-ray bursts--both extremely luminous, distant objects--has revealed a puzzling inconsistency. Galaxies appear to be four times more common in the direction of gamma-ray bursts than in the direction of quasars. "Quasars are thought to be powered by accretion of material onto supermassive black holes in the centers of distant galaxies. Gamma-ray bursts, the death throes of massive stars, are the most energetic explosions in the universe. But there is no reason to expect galaxies in the foreground to have any association with these background light sources. "The result contradicts our basic concepts of cosmology, and we are struggling to explain it,' said Jason X. Prochaska, associate professor of astronomy and astrophysics at the University of California, Santa Cruz." http://www.eurekalert.org/pub_releas...-ass073106.php Bob Clark |
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