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  • Speeding Star to Escape from Milky Way

    11/29/2007 10:15:27 AM PST · by Freeport · 76 replies · 117+ views
    Space.com ^ | 28 November 2007 | Dave Mosher
    One of the fastest moving stars ever seen is challenging theories to explain its blistering speed. The cosmic cannonball, a neutron star known as RX J0822-4300, was discovered with NASA's Chandra X-ray Observatory. Astronomers used five years of Chandra observations to show that the rogue star is careening away from the Puppis A supernova remnant, leftovers of a star that exploded about 3,700 years ago. The neutron star is racing out of our Milky Way Galaxy at about 3 million mph (4.8 million kph). "Just after it was born, this neutron star got a one-way ticket out of the galaxy,"...