These stars go out with a bang known as a “supernova explosion”, during which the core of the exploding star is compressed in an almost perfect sphere with a radius of little more than 10 km. A pulsar is formed during the violent death of a star several times more massive than our sun. What we see in this enigmatic image is the signal produced by a pulsar known as B1919+21, the first pulsar ever discovered.
Jodrell Bank Centre for Astrophysics, University of Manchester, Author provided Unknown treasures in space Recording of the same pulsar, exactly 40 years after the album was released.