Question

what is supernova?????​

Answer 1

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A supernova is a powerful and luminous stellar explosion. This transient astronomical event occurs during the last evolutionary stages of a massive star or when a white dwarf is triggered into runaway nuclear fusion.

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Answer 2

Explanation:

A supernova is a powerful luminous stellar explosion. This transient astronomical event occurs during the last evolutionary stage of a massive star orwhen a white dwarf is triggered into runaway nuclear fusion .