Found: gamma-ray background information. (Astronomy).(Brief Article) Science News | September 28, 2002 | COPYRIGHT 2002 Science Service, Inc. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan.  All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information) Copyright

Resolving a 30-year-old mystery, astronomers say they have identified the source of the gamma-ray background, the faint high-energy radiation permeating the cosmos. Caleb A. Scharf and Reshmi Mutcherjee of Columbia University compared known positions of 2,469 galaxy clusters with data collected for 9 years by NASXs Compton Gamma Ray Observatory. Gamma rays are concentrated in regions surrounding the most massive clusters, the scientists report in an upcoming Astrophysical Journal.

This statistical result supports a theory proposed recently by Avl Loeb of Harvard ...

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