News of the WeekAstrophysics

Universe's Highest-Energy Particles Traced Back to Other Galaxies

Science  09 Nov 2007:
Vol. 318, Issue 5852, pp. 896-897
DOI: 10.1126/science.318.5852.896

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Summary

Ultrahigh-energy cosmic rays appear to come from the neighborhoods of certain nearby churning galaxies, physicists working with the Pierre Auger Observatory report on page 938 of this week's issue of Science. The finding marks a first big step toward explaining the mysterious particles, others say.