Distance of a Supernova Candidate from Earth: Is it Safe?

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There are currently no supernova candidates close enough to Earth to pose a significant threat from radiation. The danger zone for potential supernova effects is estimated to be between 10 to 50 light years. While nearby planetary systems could be affected, Earth is considered safe from the effects of a supernova like Betelgeuse. The general consensus is that any supernova occurring at a safe distance will not annihilate life on Earth. Therefore, the risk from nearby supernova candidates remains minimal.
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Is there any supernova candidate in the neighbourhood of the earth, near enough to be able to annihilate us due to the radiation?

Which is the minimum distance a supernova can stay whithout friying us?

anybody knows?
 
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Off the top of my head, I don't think there are any candidates close enough to be of great concern. Correct me if I'm wrong.

In general, any planets of a star going supernova are going to be deep fried...
http://itss.raytheon.com/cafe/qadir/q1803.html

...planetary systems a few light years away might get very nervous...
http://itss.raytheon.com/cafe/qadir/q347.html

...this same astronomer (all links herein) estimates the danger zone at around 10-50 light years...
http://itss.raytheon.com/cafe/qadir/q2742.html

As for the Earth, Betelgeuse might put on an interesting show but I think we'll be ok...
http://itss.raytheon.com/cafe/qadir/q1380.html
 
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