News On This Day In History: Astronomer Johannes Kepler Observes Supernova – On Oct 17, 1604 AncientPages.com | October 17, 2016 AncientPages.com - On October 17, 1604, German astronomer Johannes Kepler observes a supernova in the constellation Ophiuchus. Supernova 1604, also known as Kepler's Supernova, was a supernova of Read More