neutron star

A neutron star is formed from the collapsed remnant of a massive star, a Type II, Type Ib, or Type Ic supernova and models predict that it consists mostly of neutrons. It is a cold star supported by the Pauli exclusion principle repulsion between neutrons. A neutron star is one of the few possible conclusions of stellar evolution.
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Noun
1. a star that has collapsed under its own gravity; it is composed of neutrons
(hypernym) star
(hyponym) pulsar

The central remains of a star which has undergone a supernova explosion. A neutron star is composed of baryon degenerate matter (that is electrons have been compressed under huge gravitational forces into protons and produced neutrons) and, hence, has a very high density . A neutron star has a typical radius of just 10 kilometers but a density of up to 1018 kg/m3. Neutron stars were once thought to be observationally impossible to detect but it seems that the celestial objects known as pulsars , are nothing more than spinning neutron stars. Also, x-ray bursters are now thought to be binary star systems in which one of the components is a neutron star. The mechanism for outburst is the same as in a traditional nova except that, instead of the accretion taking place onto a white dwarf , it spirals down onto a neutron star.

Eng: neutron star
Urdu: نیوٹرون ستارہ؛ لاشعاع ریز جرمِ فلکی جس کے بارے میں یہ فرض کرلیا گیا ہے کہ وہ کسی تباہ شُدہ ستارے سے خارج ہونے والےایٹمی ذرّات ہیں۔