Ludwig Schwarz

Peter Carl Ludwig Schwarz (Julian, O.S.: 23 May 1822, Danzig-Gdańsk – 17 September 1894, St. George's?, buried in Tartu)(Gregorian, N.S.: 4 June 1822 – 29 September 1894), referred to mostly as Ludwig Schwarz, of Imperial Russia, explorer, and professor of astronomy at the University of Dorpat honored with the Konstantin Medal of the Imperial Russian Geographical Society. Schwarz also was a recipient of the Demidov Prize of the Academy of Sciences of St. Petersburg in 1865 for his work in geodesy. to 1891,

During his tenure in later life he conducted studies of one third of the 10,000 celestial stars visible at Tartu. [English: A Study in the Field of Practical Astronomy]. Schwarz, Ludwig (1887–1893); Beobachtungen, angestellt und herausgegeben von Ludwig Schwarz, Band 17-20; Kaiserliche Universitats-Sternwarte, Dorpat (Jurjew) [English: Observations made and published from Ludwig Schwarz, Volumes 17-20; Imperial University Observatory].