T.Pyxiis, a massive explosive white Dwaf star in a bainary star system with a sun-like star in our milky way Galaxy. T. Pyxidis could have exploaded 3260 Light years agoto 1,000 parsecs (1 parsec = 3.26 Light-Years) ago but NO ONE knows because of the distance time delay. if the star exploads it will be equivalent to 20 billon billon billon megatons of TNT. Dward plen has had a increase of mass witch could lead to it exploading.