In 2014, a massive, dying supergiant star in the Andromeda Galaxy began dimming, decreasing in brightness by a factor of 10,000.

Fraser Cain

In 2014, a massive, dying supergiant star in the Andromeda Galaxy began dimming, decreasing in brightness by a factor of 10,000. After a few months, it was all but invisible, with only a faint infrared afterglow left behind to mark its location. A star with this much mass should have detonated as a supernova; instead, it appears to have just faded away, turning directly into a black hole. This could be one of the first direct observations of a failed supernova.

https://arxiv.org/abs/2410.14778

https://m.universetoday.com/system/media_attachments/files/113/448/659/530/943/344/original/422b5944c84f722b.jpg