As nouns the difference between supernova and superbubble
is that supernova
is supernova while superbubble
is (astronomy) a very large region of space, relatively free of matter, created by multiple supernova explosions.
(astronomy) A star which explodes, increasing its brightness to typically a billion times that of our sun, though attenuated by the great distance from our sun. Some leave only debris (Type I); others fade to invisibility as neutron stars (Type II).
* supernova remnant
(astronomy) A very large region of space, relatively free of matter, created by multiple supernova explosions