A team of astronomers has created a new animated map revealing fresh secrets about a mysterious "zombie star" at the heart of a nebula leftover from a distant supernova witnessed by astronomers in 1181. The remnant, known as SN 1181, is still expanding and exploding at a constant speed. The study's findings provide further evidence that the guest star observed by astronomers back then came from Pa 30, a giant cloud of gas wider than our entire solar system.

Source: https://www.livescience.com/space/cosmology/supernova-that-lit-up-earths-skies-843-years-ago-has-a-flowering-zombie-star-at-its-heart-and-its-still-exploding