A neutron star is an incredibly dense stellar remnant formed after a massive star undergoes a supernova explosion. Despite being only about 20 kilometers (12 miles) in diameter, it can have a mass greater than that of the Sun. Neutron stars are composed almost entirely of neutrons, packed so tightly together that a sugar-cube-sized amount of neutron-star material would weigh about a billion tons on Earth. They have extremely strong gravitational and magnetic fields and can rotate very rapidly, sometimes hundreds of times per second. Some neutron stars emit beams of radiation and are observed as pulsars.
#youtubeshorts #cosmos #earthfromspace
