A supernova is a bright, catastrophic star explosion. In particular, so-called thermonuclear supernovae signal complete destruction of a white dwarf star and leave nothing. At least that’s what computer models and space observations have suggested so far.
However, data from the Hubble Space Telescope have given a team of astronomers an unprecedented view of a particular thermonuclear supernova called SN 2012Z. They were shocked to discover that the star had survived the explosion. And more than that: the white dwarf not only survived, but its glow became even stronger.