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A celestial body having a mass of 1.4 to 2.1 solar masses contained within a radius of only about 10 kilometers (6 miles), formed when a massive star collapses with sufficient energy to force all of its electrons into the nuclei that they orbit, where they react with protons, leaving only neutrons. Neutron stars are powerful sources of radio waves and x-rays.
(Astronomy) a star that has collapsed under its own gravity to a diameter of about 10 to 15 km. It is composed mostly of neutrons, has a mass of between 1.4 and about 3 times that of the sun, and a density in excess of 1017 kilograms per cubic metre
an extremely dense, compact star composed primarily of neutrons, esp. the collapsed core of a supernova.
A celestial object consisting of an extremely dense mass of neutrons, formed by the forcing together of protons and electrons in the collapse of a massive star. Most neutron stars rotate very rapidly. Many have powerful magnetic fields that focus radio waves, light, and other radiation into two beams that point outward from the magnetic poles. See more at star.
The smallest but densest kind of star, apparently resulting from a supernova explosion that compressed the star’s particles into subatomic neutrons. A neutron star 15 mi (25 km) across can equal the Sun’s mass.
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|Noun||1.||neutron star - a star that has collapsed under its own gravity; it is composed of neutrons|
pulsar - a degenerate neutron star; small and extremely dense; rotates very fast and emits regular pulses of polarized radiation
star - (astronomy) a celestial body of hot gases that radiates energy derived from thermonuclear reactions in the interior