Ptolemy's system of astronomy held up until 1543, when this Polish astronomer went heliocentric
The Modlibgs were a prominent Polish family who had been 
well known in .... contradictions in the two "official" systems of astronomy
Aristotle's theory of .... That same year (before 8 November 1512) Copernicus 
assumed... [DOC] [TLE] Nicolaus Copernicus - Religious Figure, Astronomer, Scholar ... [PAR] May 20, 2016 ... Nicolaus Copernicus was instrumental in establishing the concept of a 
heliocentric system, in which planets revolve around the sun.