Archimedes' Planetarium
Unfortunately, there is no detailed description of the mechanisms that animated Archimedes' planetarium. In 1974, science historian Derek J. De Solla Price presumed that the instrument functioned with gear trains similar to the ones present in the Antikythera mechanism, dating to the I century B.C. In 1975, astronomy historian Otto E. Neugebauer concluded, on the contrary, that no mechanism of the kind could combine the diurnal motion of the asters around the celestial poles and the motions of the Sun and Moon and of the other planets along the ecliptic, as seems to emerge from
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