C/2012 S1, also known as Comet ISON or Comet NevskiâNovichonok, is a sungrazing comet discovered on 21 September 2012 by Vitali Nevski (ÐиÑалий ÐевÑкий, Vitebsk, Belarus) and Artyom Novichonok (ÐÑÑÑм ÐовиÑонок, Konudopoga, Russia). The discovery was made using the 0.4-meter…