TY - BOOK AU - Ptolemy AU - Copernicus, Nicolaus AU - Kepler, Johannes TI - The Almagest, On the revolutions of the heavenly spheres, Epitome of Copernican astronomy: IV and V. The harmonies of the world U1 - 522 PY - 1952/// CY - Chicago PB - Encyclopedia Britannica, Inc KW - Astronomy 2.Mathematics N1 - The Almagest By Ptolemy; On The Revoluations Of The Heavenly Spheres By Nicolaus Copernicus;Epitome Of Copernican Astronomy: Iv And V.The Harmonies Of The World: V By Johannes Kepler ER -