In the summer of 1967, Jocelyn Bell, a graduate student at Cambridge University's Mullard Radio Astronomy Observatory, discovered that a radio telescope she was monitoring had picked up some curious signals from space. She called the beat-like pulses to the attention of Astronomer Antony Hewish, the senior scientist. Hewish's team at first suspected them to be signals from an extraterrestrial civilization. But further inquiry proved that pulsars, as the signal sources were named, were actually long-sought neutron stars, small and incredibly dense collapsed stars. So significant was the discovery to the understanding...
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