sentences:  The state of the question as received by Copernicus is summarized in the "Theoricae novae planetarum" by Georg von Peuerbach, compiled from lecture notes by Peuerbach's student Regiomontanus in 1454, but not printed until 1472.Peuerbach attempts to give a new, mathematically more elegant presentation of Ptolemy's system, but he does not arrive at heliocentrism.Regiomontanus was the teacher of Domenico Maria Novara da Ferrara, who was in turn the teacher of Copernicus.