On this day in history, November 6th… 1572 : Wolfgang Schüler observed a Supernova (i.e, a burst of radiation that often briefly outshines an entire galaxy, caused by a star exploding) in the constellation ‘Cassiopeia’. Although it’s hard to say if the astronomer Schüler was actually the first to observe this phenomenon, dubbed one of the most important events in astronomy, he published Stella Nova (Latin: […]