(Pup A, SNR G260.4-03.4)
(supernova remnant bright in X-ray)
Puppis A (or Pup A) is a supernova remnant about
7000 light-years away for a supernova that would have become visible
to Earth about 3700 years ago.
It was discovered in 1971 as an X-ray source and
is very bright in X-rays. Associated with it is
RX J0822-4300, the supernova's neutron star remnant,
which apparently was kicked,
becoming a hypervelocity star.
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