Star of wonder: Dazzling new image of supernova Cassiopeia A released by First Lady Jill Biden and Purdue astronomer

Ten thousand years ago, a star exploded. Now scientists are getting their best look ever at the details of that explosion, Cassiopeia A. Space-age tools and methods are allowing them to glimpse never-seen-before details that may change forever the way scientists think about star death, star formatio...