The discovery of PSR B1919+21, the first pulsar, emerged from the tireless work of astronomers Jocelyn Bell Burnell and Antony Hewish at the University of Cambridge. Using a radio telescope initially constructed for the study of quasars, they detected unusual radio signals that indicated a celestial object emitting periodic pulses. The first signals, originally dubbed 'LGM-1' for 'Little Green Men', were detected on August 6, 1967, but significant analysis continued until a full understanding of the pulsar's nature was achieved in November of the same year.

The pulsar PSR B1919+21, located in the constellation Vulpecula, exhibited a remarkably consistent rhythm, which was later confirmed to be due to its rotation as a neutron star. Neutron stars are the remnants of supernova explosions, and the discovery of pulsars provided pivotal evidence supporting theories about the life cycle of stars and the nature of compact celestial objects. The regularity of the signals allowed astronomers to explore the phenomenon known as 'timekeeping' in the cosmos, paving the way for advancements in radio astronomy.

This groundbreaking work also underscored the contributions of women in science, as Jocelyn Bell Burnell's role in the discovery had historically been overshadowed by her male counterparts. Moreover, it inspired subsequent research into neutron stars, black holes, and the nature of the universe, leading to innovations in astrophysical theories and practices.