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Nasa finds 'cocoon' inside the Black Widow's web

NASA’s Chandra X-ray Observatory image of the mysterious “Black Widow” pulsar reveals the first direct evidence of an elongated cocoon of high-energy particles. (A pulsar is a rotating neutron star producing powerful beams of radiation that sweep like a searchlight.) This discovery shows this billion-year-old rejuvenated pulsar is an extremely efficient generator of a high-speed flow of matter and antimatter particles.