I wonder how many centimeters the oceans will rise if this comes to pass? I'm sure the left will blame it on Bush anyway. Supernova may wipe out the Earth | The Sun |News A STAR primed to explode in a blast that could wipe out the Earth was revealed by astronomers yesterday. It will self-destruct in an explosion called a supernova with the force of 20 billion billion billion megatons of TNT. New studies show the star, called T Pyxidis, is much closer than previously thought at 3,260 light-years away - a short hop in galactic terms.