Weegy: All three developed progressively more accurate models of our solar system.
As is well known to experts, in the Almagest Ptolemy set the deferent radii for all of the planetary
models at a constant length of 60 units, [ scaling the epicycle radii to that length.
Copernicus himself suggests that he was obsessed with the failures of his predecessors, inconsistencies
among astronomers about the ordering of the planets, and puzzles related ... (More)