Cosmic Ray Spectrum (IMAGE)
Caption
This scientific figure of the cosmic ray energy spectrum, provided by researcher Bakhtiyar Ruzybayev at the University of Delaware, shows the steepening at the "knee." Below the knee, cosmic rays are galactic in origin; above that energy, particles from more distant regions in our universe become more and more likely, he says.
Credit
Bakhtiyar Ruzybayev/University of Delaware
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