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what is supernova?
Who Are We
A supernova (pl.: supernovae or supernovas) is a powerful and luminous
explosion of a star.
A supernova occurs during the last evolutionary stages of a massive star, or when a white dwarf is triggered into runaway nuclear fusion. The original object, called the progenitor, either collapses to a neutron star or black hole, or is completely destroyed to form a diffuse nebula.
The peak optical luminosity of a supernova can be comparable to that of an entire galaxy before fading over several weeks or months.
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