Detailed image of red giant confirms theory about massive stars
 

The red giant π1 Gruis is 530 light-years away, and it's reaching the end of its natural life. Soon, scientists think it will become a planetary nebula. But before it dies, astronomers are using π1 Gruis to shed light on some of the secrets of...

https://www.engadget.com/2018/01/30/...nfirms-theory/