We do not yet have enough experimental data to answer the question precisely, but there have been about one per century in the Milky Way (at least, the part that we can see). We know that there are supernovas in other galaxies, but they are detectable only through large telescopes.
Supernovas are the explosions of large stars in space.
6
36 years
3 years
11
18
114
1500
8085
4 years apart
In the Milky Way, a supernova occurs about once every 50 years.
no