Historical Supernovae
Here's a representation (using another similar galaxy to our own) of the respective location of most of the historical (recorded) supernovae; our sun being "Zon":
It shows something very striking!! They all took place in the same area of our galaxy....Why? Because it's the only visible one...Meaning many other stars could have gone supernova without us knowing it!
From the Belgian magazine "Het Heelal" (the universe)
Raoul