How can we probe the interiors of neutron stars? Astronomers Wynn Ho and Craig Heinke have approached this tough question using the Chandra X-Ray Observatory. They monitored a nearby neutron star at the center of the Cassiopeia supernova remnant (created by a supernova that occurred in the 1680s), a mere 11,000 light-years away. However, their work has created more questions than answers.
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