The last galactic supernova, which erupted on September 9, 1604. It is named after a famous German astronomer who observed it at that time. It was visible to the naked eye for 12 months and several weeks, and its brightness of -2.5mag surpassed even the planet Jupiter. Johannes Kepler and David Fabricius determined its position with such precision that the German-American astronomer Walter Baade could identify a faint nebula, the remnant of the supernova, in the same location in 1943. The star itself is now fainter than 19mag and can only be observed with the largest telescopes. Its remnant was also revealed by the Hubble Space Telescope.