In 1967, Jocelyn Bell became the first human to observe a neutron star. She went on to the presidency of the Royal Astronomical Society, and knighthood, but she was excluded from the 1974 Nobel Prize for Physics that went to her supervisor. Her star, PSR B1919+21, is 2283 light years from here, and pulses every 1.33 seconds. The list of known neutron stars now runs above 2000. Today is her 73rd birthday.
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