[1] They are created as a result of supernovas and gravitational collapse,[2] and are the second-smallest and densest class of stellar objects.
[3] In the cores of these stars, protons and electrons combine to form neutrons.
[2] Neutron stars can be classified as pulsars if they are magnetized, if they rotate, and if they emit beams of electromagnetic radiation out of their magnetic poles.
[4] They may include soft gamma repeaters (SGR) and radio-quiet neutron stars, as well as pulsars such as radio pulsars, recycled pulsars, low mass X-ray pulsars, and accretion-powered pulsars.
A notable grouping of neutron stars includes the Magnificent Seven.