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Johannes Kepler’s original drawing depicting the location of the stella nova, marked with an N (8 grid squares down, 4 over from the left).
Today 17 October in 1604.
Johannes Kepler began observing Supernova 1604, in Prague.
How known as Kepler’s Supernova, Kepler’s Nova or Kepler’s Starit.
Supernova 1604 is the latest observed supernova in our galaxy.
Maintained naked-eye visibility for 18 months.