After the initial compression of the neutron core, neutrons arrange themselves in a crystalline structure which suddenly expands. The surface of the neutron core bounces back at 15% of the speed of light against the huge overlying weight of the star. This causes a powerful shock wave to move outward, ripping though the rest of the star. From the time the core rebounds it takes about 3 hours for the supersonic shock wave to reach the star's surface, the surface of the neutron core bounces back at 15% of the speed of light against the huge overlying weight of the star. This causes a powerful shock wave to move outward, ripping though the rest of the star. From the time the core rebounds it takes about 3 hours for the supersonic shock wave to reach the star's surface .....
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