neutron star

Noun
  1. A star that has collapsed under its own gravity;
    It is composed of neutrons (synset 109392603)
    is a type of: star - (astronomy) a celestial body of hot gases that radiates energy derived from thermonuclear reactions in the interior
    subtypes: pulsar - a degenerate neutron star; small and extremely dense; rotates very fast and emits regular pulses of polarized radiation

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