Rodney Pommier, taken from Portland, Oregon Roughly 40 million years ago near the core of the spiral galaxy NGC 7331, a white dwarf star ended its life in a thermonuclear explosion. The light from that explosion was detected July 14 by the Gravitational-wave Optical Transient Observer project. This astroimager acquired the shot on the left Continue reading "Spot the supernova" The post Spot the supernova appeared first on Astronomy Magazine .