acoreus aglaonike almanac american computer museum analog computer anaximander ancient corinth ancient olympic games andronicus of cyrrhus angular velocity antikythera antikythera wreck apollonius of perga aratus archimedean spiral archimedes aristarchus of samos aristillus aristotle aristotle university of thessaloniki armillary sphere astrarium astrolabe astronomy astronomy in medieval islam athens attalus of rhodes australia autolycus of pitane automaton babylonian astronomy bion of abdera book of ingenious devices calculator callippic cycle callippus cardiff university celestial spheres chaldea cicero circle of latitude claudian cleomedes cleostratus clockmaker commodus conon of samos corfu corinth counter-earth crete de re publica deferent and epicycle digital object identifier dioptra dodona eclipse eclipse cycle egyptian astronomy egyptian calendar equant equatorial ring equilateral triangle eratosthenes euctemon eudoxus of cnidus gamma ray geminus geocentric model gnomon greece greek astronomy greek language heliocentrism heraclides ponticus hewlett-packard hicetas hipparchic cycle hipparchus hippocrates of chios history of science history of technology hypsicles iberian peninsula illyria indian astronomy inferior and superior planets islamic golden age isthmian games jacques-yves cousteau julian calendar julius caesar jupiter koine greek lactantius leverhulme trust library of alexandria lunar phase marcus claudius marcellus mars menelaus of alexandria meton of athens metonic cycle middle ages mona lisa monastery month moon mural instrument national archaeological museum of athens national bank of greece national and kapodistrian university of athens nemean games new york university nine lyric poets nuclear physics octaeteris odometer oenopides on sphere-making orrery panhellenic games pappus of alexandria philip of opus philolaus pindar planetarium plato pliny posidonius proclus ptolemy pytheas pythian games rhodes roman empire roman triumph saros cycle saturn science in medieval western europe scientific american seleucus of seleucia seneca the younger sicily sidereal solstice sosigenes of alexandria sosigenes the peripatetic sothic cycle spain spherical earth squeak strabo sublunary sphere sun sydney thales the economist the engines of our ingenuity the guardian the independent the new york times the scotsman the times theodosius of bithynia theon of alexandria theon of smyrna this binary universe timocharis tomography tower of the winds united kingdom university of sydney venus vitruvius wikimedia commons x-ray yale university year zodiac