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Video: NASA's Van Allen probes find an impenetrable barrier in space around Earth


Two donuts of seething radiation that surround Earth, called the Van Allen radiation belts, have been found to contain a nearly impenetrable barrier that prevents the fastest, most energetic electrons from reaching Earth. The radiation belts & plasmapause saving Earth from deadly outer space electrons as shown courtesy of NASA's Van Allen probes. Credit: Van Allen Probes

 

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