Nicolaus Copernicus is known that Copernicus knew Polish on a par with German and Latin. Historian Michael Burleigh describes the nationality debate as a "totally insignificant battle" between German and Polish scholars during the interwar period. Polish astronomer Konrad Rudnicki calls the discussion a "fierce scholarly quarrel in ... times of nationalism" and describes Copernicus as an inhabitant of a German-speaking territory that belonged to Poland, himself being of mixed Polish-German extraction. Czesław Miłosz describes the debate as an "absurd" projection of a modern understanding of nationality onto Renaissance people, who identified with their home territories rather than with a nation. Similarly,
Nicolaus Copernicus that the earth orbited the sun. Further mathematical details of Aristarchus' heliocentric system were worked out around 150 BCE by the Hellenistic astronomer Seleucus of Seleucia. Though Aristarchus' original text has been lost, a reference in Archimedes' book "The Sand Reckoner" ("Archimedis Syracusani Arenarius & Dimensio Circuli") describes a work by Aristarchus in which he advanced the heliocentric model. Thomas Heath gives the following English translation of Archimedes' text: Copernicus cited Aristarchus of Samos in an early (unpublished) manuscript of "De Revolutionibus" (which still survives), though he removed the reference from his final published manuscript. Copernicus was probably aware that