NASA's Fermi Closes on Source of Cosmic Rays

Credit: NASA/DOE/Fermi LAT Collaboration
New images from NASA's Fermi Gamma-ray Space Telescope show where supernova remnants emit radiation a billion times more energetic than visible light. The images bring astronomers a step closer to understanding the source of some of the universe's most energetic particles -- cosmic rays.

Cosmic rays consist mainly of protons that move through space at nearly the speed of light. In their journey across the galaxy, the particles are deflected by magnetic fields. This scrambles their paths and masks their origins.

Read more: http://www.nasa.gov/mission_pages/GLAST ... ource.html

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