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Nearby pulsar a likely source of high-energy antimatter cosmic rays

31 Dec 2019, 15:21 UTC
Nearby pulsar a likely source of high-energy antimatter cosmic rays NASA’s Goddard Space Flight Center/M. Di Mauro

Geminga is the name given to a pulsar 800 light years away that spins on its axis every 4.2 seconds. It is one of the brightest sources of pulsar-generated gamma rays, sporting a faint but vast halo that, if visible to human eyes, would appear 40 times larger than the full moon.

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