Page 122 - 89 history of astronomy_opt

authority the above statements are made.
[4] See p. 6 for definition.
4. THE REIGN OF EPICYCLES–FROM
PTOLEMY TO COPERNICUS.
After Ptolemy had published his book
there seemed to be nothing more to do for
the solar system except to go on observ-
ing and finding more and more accurate
values for the constants involved–viz., the
122