出典:Wikipedia
出典:『Wikipedia』 (2011/06/02 08:12 UTC 版)
Hypernova (pl. hypernovae) refers to an exceptionally large star that collapses at the end of its lifespan. Until the 1990s, it referred specifically to an explosion with an energy of over 100 supernovae (over 1048 joules); such explosions are believed to be the origin of long-duration gamma ray bursts.