Long gamma - ray bursts, which flash for up to 100 seconds or longer, are believed to occur when massive stars explode as supernovae. (scientificamerican.com)
Stars that are eight or more times the mass of the sun explode as supernovae at the end of their lives. (newscientist.com)
CE: If the first stars to evolve were somehow extremely large, they would have exploded as supernovas in only a few tens of millions of years. (creationscience.com)