A supernova is the biggest explosion that humans have ever seen. Each blast is the extremely bright, super-powerful explosion of a star. One type of supernova is caused by the “last hurrah” of a dying massive star. This happens when a star at least five times the mass of our sun goes out with a fantastic bang! Massive stars burn huge amounts of nuclear fuel at their cores, or centers. This produces tons of energy, so the center gets very hot. Heat generates pressure, and the pressure created by

NASA's Hubble Space Telescope watched a star explode into oblivion. At its peak, the supernova burst was 5 billion times as bright as the Sun: https://go.nasa.gov/36naSSp | NASA - National Aeronautics and Space Administration

NASA - National Aeronautics and Space Administration has seen the flash of an exploding star for the first time | Sky News