A cosmic mystery: Astronomers capture dying star blowing smoke rings - Ars Technica

"A new and fascinating wrinkle to our understanding of how stars end their lives."

Enlarge/ A rendering of the star V Hydrae, or V Hya for short. In its death throes, the star emitted a series of expanding rings that scientists calculated are being formed every few hundred years, p… [+6258 chars]

full article...