| | Amazon.com: Ptolemy's "Almagest": Books: Ptolemy,G. J. Toomer,Owen Gingerich (Site not responding. Last check: 2007-10-20) |
 | | The main desire of Ptolemy in writing his Almagest is to explain and account for the motions of the apparently erratic celestial beings in terms of perfect and circular motions. |
 | | Some may find his introduction of his equant (something that is often said to defile his principles of perfect motion), which explains the retrogradation of the outer planets, to be a let down to the fanfare of perfection in the stars. |
 | | Yet, overall, the Almagest manages to recapture the magic and wonder of the universe through complicated mathematical hypotheses and to succesfully lay the ground for the break throughs of Copernicus, Brahe, and Kepler to come. |
| www.amazon.com /Ptolemys-Almagest-Ptolemy/dp/0691002606 (1079 words) |