Supernova
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- 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
- Simeis 147 - c.40000ya
- IC 443 - c.30000ya
- W50 - c.20000ya
- Vela SNR - c.10000 - 9000 BCE
- Ganidra - c.8000 BCE
- Kesteven 79 - c.8500 - 7000 BCE
- Cygnus Loop - c.6000 - 3000 BCE
- Puppis A - c.1700 BCE
- RCW 103 - c.100
- SN 185 - 185
- SN 386 - 386
- SN 393 - 393
- W49B - c.1000
- SN 1006 - 1006
- Crab Nebula - 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 supernova candidates
- Eta Carinae (Unclear)
- Antares (c.10,000y)
- Betelgeuse (c.1my)
- Deneb (millions of years)