... Tonight's Sky . ... Observing . ... Young super-Jupiter found wandering without a parent . Supernova showered Earth with radioactive debris . ... Earth awash in asteroid's dust . A colossal asteroid's breakup millions of years ago spread a profusion of extraterrestrial dust onto Earth's surface. ... The date of this asteroid's breakup coincides with the peak in the interplanetary dusting event on Earth. ... Only registered members of Astronomy.com are allowed to comment on this article. ...