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They’re a little cagey about exactly where the crossover point lies relative to the likelihood of devastating effects on the planet.
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That rising part of the curve is interesting. :D Like we probablyishy die, but at least we get great data while it happens - making us 50% happy?
Wikipedia (Near-Earth Supernova) says that a 25 ly away supernova would wipe out half the ozone layer so that’s probably the lower bound for what we want
Geez, how many stars do we have that close to us?
So far, we know of 131
starsobjectshttps://en.wikipedia.org/wiki/List_of_nearest_stars_and_brown_dwarfs