Pulsars are rapidly spinning neutron stars, the superdense remains of massive stars that have exploded as supernovas. |
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A swirling chaos of superdense matter with temperatures exceeding 18 billion degrees Fahrenheit surrounded the newborn black hole. |
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Astronomers have measured an effect long predicted by Einstein's theory of General Relativity in the extremely strong gravity of a pair of superdense neutron stars. |
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