Jakob Bartsch
Jacob Bartsch (* 1600 in Luban, † December 26, 1633 ) was a German astronomer.
Bartsch wrote several astronomical journals, including Planisphaerium Stellatum. He was the son of Johannes Kepler and supported him partly in its calculations. After his death he edited the utopian work of Kepler Somnium ( "The Dream" ).
He studied astronomy and medicine at the University of Strasbourg.
In 1624, Bartsch star maps published under the title custom astronomicus planisphaerii stellati. Bartsch here took over, among others, the following described in 1613 by Peter Plancius constellations, which had been shown on celestial globes by Pieter van den Keere, and made them thus to a wider audience: Giraffe, the Southern Cross, unicorn network.
Bartsch married on March 12, 1630 Johannes Kepler's daughter Susanne and helped him before with his scientific work. According to Kepler's death in 1630 Bartsch collected money for Kepler's widow and tried posthumously Kepler's Somnium book. to publish what he failed because he died before.