Unexplained pattern of cosmic rays discovered
Wednesday, July 28, 2010 - 11:28
in Astronomy & Space
Researchers saw an unusual pattern when they looked at a "skymap" of the relative intensity of cosmic rays directed toward the Earth's Southern Hemisphere, with an excess of cosmic rays detected in one part of the sky and a deficit in another. A similar lopsidedness, called "anisotropy," has been seen from the Northern Hemisphere by previous experiments, but its source is still a mystery.