Supernova

• Massive stellar explosion occurring at the end of a star's natural life cycle due to fusion pressure no longer able to balance against gravitational core collapse
  • Results in a stellar remnant in the form of either a neutron star or a black hole
• Resulting explosion produces a wavefront of intense radiation, devastating planetary ecosystems within 25-50 ly
  • Often also results in a surrounding micronebula, or even full nebula

Known supernovae

• Limited specifically to supernovae within the Milky Way
  • Ganidra - c.8000 BCE
  • SN 185 - 185
  • SN 386 - 386
  • SN 393 - 393
  • SN 1006 - 1006
  • SN 1054 - 1054
  • SN 1181 - 1181
  • SN 1572 - 1572
  • SN 1604 - 1604
  • Cassiopeia A - c.1680
  • SNR G1.9+0.3 - c.1868
  • FGC-758 - 2168
  • Beta Volanis - 2230s
  • Alpha Lupi - 2236
  • Minara - 2268
  • Beta Niobe - 2269
  • Beta Stromgren - 2366

Known pending supernovae

• Betelgeuse (c. 1my from present)