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A supernova is an exploding star. The Earth would be instantly incinerated, of course.

There is approximately zero chance this will ever happen, though.

If there was a supernova near Earth ... it would depend on how near. Betelgeuse is a good candidate for a supernova "soon" (within the next million years or so). Scientists who have modeled supernova explosions don't expect it will have much of an impact. If a star nearer than Betelgeuse were to go supernova, then it might be more serious.

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11y ago

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