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Copernican Revolution

Historical question: I thought Copernicus' heliocentric model was not
initially any more accurate than Ptolemy's. Didn't he even have to have a
few epicycles himself? Until Kepler? (See
<http://www.physics.gmu.edu/classinfo/astr103/CourseNotes/ECText/ch02_txt.ht
m#2.2.1.>.)

Not according to NPR's "Math Guy" this morning:
<http://www.npr.org/ramfiles/wesat/20000219.wesat.04.ram>.

Larry