A failed supernova is an astronomical event in time domain astronomy in which a star suddenly brightens as in the early stage of a supernova, but then does not increase to the massive flux of a supernova. They could be counted as a subcategory of supernova imposters. They have sometimes misleadingly been called unnovae.
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Failed supernova in the context of Stellar explosion
Stellar explosion can refer to:
- Nova
- Kilonova
- Micronova
- Supernova
- Supernova impostor, stellar explosions that appear similar to supernova, but do not destroy their progenitor stars
- Luminous red nova, an explosion thought to be caused by stellar collision
- Solar flares are a minor type of stellar explosion
- Tidal disruption event, the pulling apart of a star by tidal forces