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08-December-2005, 02:46 AM
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Older Quasars a Source of Cosmic Rays
SUMMARY: NASA astronomers believe that retired quasars may be a source of rare, high-energy cosmic rays. They've identified four elliptical galaxies relatively nearby that contain massive black holes. If these black holes are spinning, they could be a source of ultra high-energy cosmic rays. The source of cosmic rays is a mystery, but astronomers have calculated that they must come from objects within 200 million light years from the Earth - these "retired quasars" could be the source.
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