View Full Version : Discussion: Older Quasars a Source of Cosmic Rays

2004-Sep-04, 04:30 PM
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.

What do you think about this story? Post your comments below.