Neutron Stars

Neutron Stars

During a supernova explosion, the center of a star can be extremely compressed and can collapse until the neutrons in the star cannot be pushed closer together. Most of the star is then a gas containing neutrons only, or perhaps the still smaller particles called quarks. The star is now a neutron star.
Neutron stars are too small and faint to be seen directly in visible light, but some neutron stars give off beams of radio radiation. As the star rotates very rapidly (approximately once every second), the beam of radiation sweeps by the earth. [VH] {SR}