A neutron star is a highly dense stellar remnant formed from the core collapse of a massive star after the exhaustion of its fuel. These celestial bodies are composed primarily of neutrons, packing immense amounts of mass into a radius typically only a few kilometers. Due to their extreme density, the gravitational force and particle pressure create unique physical conditions that are difficult to model. Neutron stars often possess extremely powerful magnetic fields and can rotate very rapidly, sometimes emitting beams of electromagnetic radiation that sweep past Earth, making them observable as pulsars. They represent one of the most extreme endpoints of stellar evolution within the physical sciences.