+ de 2800 Acessos
Não parece, mas em 100 A.C., essa engenhoca já serviu para "prever as posições do sol e da lua no zodíaco em qualquer data" passada, presente ou futura. Trata-se do(a) Antikythera: um "computador astronômico" [não me culpe, não fui eu quem inventou a expressão].
Está em uma reportagem da Economist, também para provar que os Antigos Gregos dominavam igualmente "a mais complexa tecnologia mecânica":
"The Greeks believed in an earth-centric universe and accounted for celestial bodies' motions using elaborate models based on epicycles, in which each body describes a circle (the epicycle) around a point that itself moves in a circle around the earth. Mr Wright found evidence that the Antikythera mechanism would have been able to reproduce the motions of the sun and moon accurately, using an epicyclic model devised by Hipparchus, and of the planets Mercury and Venus, using an epicyclic model derived by Apollonius of Perga. (These models, which predate the mechanism, were subsequently incorporated into the work of Claudius Ptolemy in the second century AD.)
"That tallies with ancient sources that refer to such devices. Cicero, writing in the first century BC, mentions an instrument 'recently constructed by our friend Poseidonius, which at each revolution reproduces the same motions of the sun, the moon and the five planets.' Archimedes is also said to have made a small planetarium, and two such devices were said to have been rescued from Syracuse when it fell in 212BC. This reconstruction suggests such references can now be taken literally."
Postado por Julio Daio Borges
24/9/2002 à 00h20
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