Longest lasting supernova
- Who
- iPTF14hls
- What
- 3 year(s)
- Where
- Not Applicable
- When
- September 2014
In September 2014, the star iPTF14hls was discovered in a dwarf galaxy 509 million light years away. The star is undergoing a supernova and was expected to fade after around 100 days. Several months after its discovery the supernova was getting brighter after fading. As of December 2017 the supernova is still ongoing after more than three years. This unique event has yet to find an explanation but it may be the first time a theoretical "pulsational pair instability supernova" has been observed.