Page 129 - 89 history of astronomy_opt

accuracy of the calculations and the tables.
The results of his cogitations were printed
just before his death in an interesting book,
De Revolutionibus Orbium Celestium . It
is only by careful reading of this book that
the true position of Copernicus can be re-
alised. He noticed that Nicetas and others
had ascribed the apparent diurnal rotation
of the heavens to a real daily rotation of
129