Astronomers are used to seeing neutron stars suddenly increase their rate of spin, but they recently witnessed one suddenly slowing down.
Neutron stars are the result of a massive star running out of fuel, going supernova and collapsing into itself. Matter inside a neutron star is so dense that a teaspoonful would weigh about a billion tons on Earth.
Neutron stars can spin at up to 43,000 times per minute and have super strong magnetic fields — up to a trillion times stronger than …
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