For over two centuries, we have watched the red giant R Leonis dim and brighten with regularity, but this 'heartbeat' is beginning to speed up near the end of the star's life.

We may be witnessing the messy death of a star in real time

Source: space
Source Link: https://www.space.com/astronomy/stars/we-may-be-witnessing-the-messy-death-of-a-star-in-real-time