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terça-feira, 12 de junho de 2012

Solar Flares Fire Up Protons, Make Gamma Rays

Solar flares produce gamma rays by several processes, one of which is illustrated here. The energy released in a solar flare rapidly accelerates charged particles. When a high-energy proton strikes matter in the sun's atmosphere and visible surface, the result may be a short-lived particle -- a pion -- that emits gamma rays when it decays.

Credit: NASA's Goddard Space Flight Center

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