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How far from a supernova do you have to be to be safe?

Updated: 8/18/2019
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7y ago

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About 50 to 100 light-years as the closest safe distance between Earth and a supernova. But, if a supernova to go off within about 30 light-years of us, that would lead to major effects on the Earth, possibly mass extinctions.

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8y ago
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7y ago

outside the solar system at least, probably a few light years away

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14y ago

A supernova nearer than about 100 light-years could be dangerous.

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