Astronomer and creator from the Skalnate Pleso Observatory in Slovakia. He became well-known for his superstar charts as well as for his breakthrough of the comet referred to as C/1947 F2. He was sick throughout his life time, so he finished up spending a whole lot of his amount of time in the Great Tatra Mountains of Slovakia. His superstar charts were released within the Skalnate Pleso Atlas from the Heavens. He was created and and elevated within the Czech city of Stara Boleslav. His superstar charts motivated many compositions by John Cage, including Etudes Boreales.