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.
yes
A safe distance from a supernova explosion would be millions of light-years away. The energy and radiation emitted during a supernova event are extremely powerful and can have destructive effects on planets and other celestial bodies nearby.
Tych Brahe
Only a very, very few stars have mass enough to become supernova. Jupiter is a planet not a star. It is far to small to become a star, let alone a supernova.
It could. it depends on the condidtion. Yes it could but after the sun goes supernova it has a chance of turning into a black hole.
Supernova for sure - it's affects will be known for billions and billions of miles, whereas a black hole is only really disastrous within the event horizon which doesn't normally extend that far.
For some not all, its safe for me so far
As far as is safe
The Vela Supernova is the remnant of a supernova explosion that occurred in the Vela constellation about 11,000 to 12,300 years ago. It is located about 800 light-years away from Earth and is one of the closest known supernova remnants to us.
As far as I'm concerned all of Spain is safe.
There are huge spaces between stars. The biggest threat to Earth would be the gamma radiation emitted, which could sterilize the Earth from as far as 10 light-years away.
Only massive stars, white and blue giants, can go supernova. Proxima centauri is a red dwarf, far to small to produce a supenova. Bellatix may be large enough to produce a supernova, but is just now leaving the main sequence, so it will be a few million years before it dies.