Discovering pulsars, a type of neutron star, Dr. Jocelyn Bell-Burnell, changed the way we understood the death of massive stars. That instead of the supernova explosion scattering all of a dying star’s material into the universe there is a very small core of very dense material left over that gives off regular radio pulses.

Image: Academy of Sciences of the Czech Republic (CC-BY SA 3.0).

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