Fraser Cain on Nostr: We know of many massive stars that are nearing the end of their lives. At some point ...

We know of many massive stars that are nearing the end of their lives. At some point in the next million years or so, they'll detonate as supernovae. But it would be nice to narrow down that timeframe. One theorized phase is that a massive star can "hiccup," with its core expanding and contracting in rapid succession, a phenomenon called "pulsational pair-instability." It happens very rarely, and now astronomers have finally caught a star having the hiccups.

https://www.qub.ac.uk/News/Allnews/featured-research/hiccuping-star-caught-in-action.html