NASA captures fast supernova that lasts only for a few days
NASA's Kepler Space Telescope has captured a Fast-Evolving Luminous Transient, which is a supernova that lasts only for a few days, about one-tenth of a typical supernova. It starts with an ageing red giant star losing mass via stellar wind, which balloons into a huge gaseous shell around the star. The star's core implodes to trigger an explosion, emitting light.