http://www.newsweek.com/image-shows-cosmic-explosion-supernova-death-star-sn2021afdx-cartwheel-1687608 > Astronomers have caught a massive star, located around 500 million light-years from Earth, erupting in a cosmic explosion marking the end of its life. > The Cartwheel galaxy, in which the astronomers witnessed the explosion, is pretty remarkable in itself as it was once a standard spiral galaxy like the Milky Way until a head-on collision with a smaller companion galaxy.