urnell observe in 1967 that was so unprecedented? How were the rapid radio pulses emitted by pulsars understood as coming from rotating neutron stars?...

What are pulsars? What did Jocelyn Bell Burnell observe in 1967 that was so unprecedented? How were the rapid radio pulses emitted by pulsars understood as coming from rotating neutron stars? Be able to describe what a neutron star is in terms of its composition, mass, size, magnetic field, and location.