PSR B1919+21
PULSAR · the first one ever found
The radio signal that started it all. In 1967, student Jocelyn Bell noticed a mysterious pulse repeating every 1.34 seconds with clockwork precision. It was so regular her team jokingly labeled it LGM-1, for little green men. The truth was just as wild: a spinning neutron star, the first pulsar, a whole new kind of object in the universe.
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