bibliography-greeks-on-astronomy

[Antiquity] The Exact Sciences in Antiquity. Otto Neugebauer. 2nd edition. Dover Publications. 1969. http://isbn.nu/0486223329
[Neugebauer] The Astronomy of Maimonides and Its Sources. Otto Neugebauer. Hebrew Union College Annual 22, 322-363, 1949. Reprinted in: Astronomy and History Selected Essays. Otto Neugebauer. 381-423 Springer. August 8, 1983. http://isbn.nu/0387908447
[Crowe] Theories of the World from Antiquity to the Copernican Revolution. Michael J. Crowe. 2nd edition. Dover Publications. 2001. http://isbn.nu/0486414442
[Evans] The History & Practice of Ancient Astronomy. James Evans. Oxford University Press. 1998. http://isbn.nu/0195095391
[Thurston] Early Astronomy. Hugh Thurston. Springer Verlag. 1996. http://isbn.nu/0387948228
[Almagest] Ptolemy’s Almagest. Translator G. J. Toomer. Princeton University Press. 1998. http://isbn.nu/0691002606
[Toomer] Campanus of Novara & Medieval Planetary Theory. G. J. Toomer Jr., Francis S. Benjamin. University of Wisconsin Press. 1972. http://isbn.nu/029905960X
[ACMA] Ancient Planetary Model Animations. http://people.sc.fsu.edu/~dduke/models
[AlmagestM] A Modern Almagest: An updated version of Ptolemy’s Almagest. http://farside.ph.utexas.edu/Books/Syntaxis/Syntaxis.html
[Ptolemaic] Summary of Ptolemaic Astronomy. http://www.clas.ufl.edu/users/ufhatch/HIS-SCI-STUDY-GUIDE/0034_summaryPtolemiacAstron.html

Rambam on Calendar