Although no supernova has been observed in the Milky Way since 1604, it appears that a supernova exploded in the constellation Cassiopeia about 300 years ago, around the year 1667 or 1680.
尽管自1604年以来还从未在银河系内发现过超新星，不过300年前的1667年或1680年左右曾在仙后座有过一次超新星爆发。