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Thanks shu to always keep me first in following .What is a supernova and what causes it?.How long does supernova last?.​

Answer» <html><body><p>se Valt, you are my best Tomodachi in Brainly. A supernova is a powerful and luminous <a href="https://interviewquestions.tuteehub.com/tag/stellar-3076306" style="font-weight:bold;" target="_blank" title="Click to know more about STELLAR">STELLAR</a> explosion. This transient astronomical event <a href="https://interviewquestions.tuteehub.com/tag/occurs-1127848" style="font-weight:bold;" target="_blank" title="Click to know more about OCCURS">OCCURS</a> during the last evolutionary stages of a massive star or when a white dwarf is triggered into runaway <a href="https://interviewquestions.tuteehub.com/tag/nuclear-2474" style="font-weight:bold;" target="_blank" title="Click to know more about NUCLEAR">NUCLEAR</a> fusion. A supernova happens where there is a change in the core, or center, of a star. ... One of the stars, a carbon-oxygen white dwarf, steals matter from its companion star. <a href="https://interviewquestions.tuteehub.com/tag/eventually-976663" style="font-weight:bold;" target="_blank" title="Click to know more about EVENTUALLY">EVENTUALLY</a>, the white dwarf accumulates too <a href="https://interviewquestions.tuteehub.com/tag/much-2164829" style="font-weight:bold;" target="_blank" title="Click to know more about MUCH">MUCH</a> matter. Having too much matter causes the star to explode, resulting in a supernova.The explosion of a supernova occurs in a star in a very short timespan of about 100 seconds. When a star undergoes a supernova explosion, it dies leaving behind a remnant: either a neutron star or a black hole.</p></body></html>


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