czsky/en/star/Keplerova_supernova.md

name	constellation	created_by	created_date	updated_by	updated_date
Keplerova supernova	Oph	8mag	2022-01-21 17:00:00	skybber	2022-02-10 16:57:44.864694

the last galactic supernova, which exploded on September 9, 1604. It is named after a famous German astronomer who observed it in those days. It was visible to the naked eye for 12 months, and for several weeks its brightness of -2.5 mag surpassed even the planet Jupiter. Johannes Kepler and David Fabricius pinpointed its position with such accuracy that the German-born American astronomer Walter Baade was able to identify a faint nebula, a supernova remnant, in the same place in 1943. The star itself is now fainter than 19mag and can only be observed with the largest telescopes. The Hubble Space Telescope has detected its remnant.