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Cosmic Ray Mystery: Largest Ever Data Sample Sheds No Light On Origin

Monday, March 6, 2017 5:41
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5 March 2017

 - Scientists are none the wiser on the origin of cosmic rays despite trawling through seven years of observational data from NASA’s Fermi Large Area Telescope.

A study published in Physical Review Letters details efforts of scientists to examine the “largest ever sample of high-energy cosmic-ray electron and positron events since the beginning of its operation.”

The team examined nearly seven years of data from the Fermi Large Area Telescope – the principal scientific instrument on the Fermi Gamma Ray Space Telescope spacecraft but fell short on pinpointing the direction from which the elusive cosmic rays originate.

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