academy acoreus aglaonike almagest anaxagoras anaximander andronicus of cyrrhus angle anicius manlius severinus boethius anthemius of tralles antikythera mechanism apollonius of perga aratus archimedes archimedes palimpsest archytas aristaeus the elder aristarchus on the sizes and distances aristillus aristotle arithmetica armillary sphere astrolabe astronomer astronomy in medieval islam attalus of rhodes autolycus of pitane babylonian astronomy babylonian mathematics bion of abdera bryson of heraclea callippic cycle callippus carpus of antioch celestial spheres chrysippus circle of latitude cleanthes cleomedes cleostratus conon of samos continued fraction counter-earth ctesibius deferent and epicycle democritus dicaearchus dictionary of scientific biography dinostratus dionysodorus diophantus dioptra domninus of larissa earth egyptian astronomy egyptian mathematics equant equatorial ring eratosthenes euclid euctemon eudemus of rhodes eudoxus of cnidus eutocius of ascalon geminus geocentric model geometry gnomon greece greek astronomy greek language greek mathematics greeks heliocentrism heraclides ponticus hero of alexandria hicetas hipparchic cycle hipparchus hippasus hippias hippocrates of chios hypatia of alexandria hypothesis hypsicles indian astronomy indian mathematics isaac newton johannes kepler library of alexandria lunar phase mactutor history of mathematics archive marinus of neapolis mathematician menaechmus menelaus of alexandria meton of athens metonic cycle moon mural instrument nicomachus nicoteles of cyrene octaeteris oenopides pappus of alexandria parallax philip of opus philolaus philon plutarch posidonius proclus ptolemy pythagoras pythagoreanism pytheas samos island science in medieval western europe seleucus of seleucia serenus of antinouplis sidereal year simplicius of cilicia solstice sosigenes of alexandria sosigenes the peripatetic spherical earth sporus of nicaea star strabo sublunary sphere sun telescope thales the sand reckoner theodorus of cyrene theodosius of bithynia theon of alexandria theon of smyrna thessaloniki thymaridas timetable of greek mathematicians timocharis tropical year world view xenocrates zeno of elea zeno of sidon zodiac