Contact: Andrea Boyle Tippett
University of Delaware
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
Usage Restrictions: Image must include credit to University of Delaware
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