New type of supernova discovered It was first observed seven years ago, but was misclassifi By
Andrea Thompson updated 5:21 p.m. ET, Thurs., Nov . 5, 2009 A new type of supernova ? the explosive death of a star ? has been discovered in which helium detonates on the surface of a white dwarf star. The exploding star, dubbed SN2002bj, was first observed seven years ago in the galaxy ...