This artist's concept depicts the pulsar planet system discovered by Aleksander Wolszczan in 1992. Pulsars are rapidly rotating neutron stars, which are the collapsed cores of exploded massive stars. They spin and pulse with radiation, much like a lighthouse beacon. Here, the pulsar's twisted magnetic fields are highlighted by the blue glow.
Credit: NASA/JPL-Caltech/R. Hurt (SSC)
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