Never-before-seen type of supernova reveals a peek inside a massive star before dying

Astronomers captured a glimpse of the innermost layers of a massive star before it exploded in a supernova, changing their understanding of how stars evolve and die.

​ Astronomers captured a glimpse of the innermost layers of a massive star before it exploded in a supernova, changing their understanding of how stars evolve and die. Read More Breaking News, Latest News and Videos | CNN