SN 1987A was a supernova that was very close to the Earth. It was so close that scientists found neutrinos before the light came to Earth. SN 1987A is the only supernova that has been that close in modern times. There have been others that were closer but they were before scientists knew much.
- Arnett, W.D.; et al. (1989). "Supernova 1987A". Annual Review of Astronomy and Astrophysics 27: 629–700.