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Oge elekere nke mbara igwe
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Oge elekere nke mbara igwe, elekere, ma ọ bụ orloj bụ elekere nwere usoro pụrụ iche na dials iji gosipụta ozi gbasara mbara igwe, dị ka ọnọdụ nke Anyanwụ, Ọnwa, Ìgwè kpakpando zodiacal, na mgbe ụfọdụ nnukwu mbara ala.
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Nrụzigharị nke oge a na Museo Nazionale Scienza e Tecnologia Leonardo da Vinci, Milan, Ịtali; ọ dị ihe dị ka mita atọ n'ịdị elu.
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A na eji okwu ahụ eme ihe iji zoo aka na elekere ọ bụla nke na egosi, na mgbakwunye na oge nke ụbọchị, ozi gbasara mbara igwe. Nke a nwere ike ịgụnye ọnọdụ nke Anyanwụ na Ọnwa n'eluigwe, afọ na usoro ọnwa, ọnọdụ nke Aanyanwụ na akara zodiac dị ugbu a, oge sidereal, na data ndị ọzọ dị ka akara ọnwa maka igosi eclipses), ma ọ bụ map kpakpando na agbagharị agbagharị. E kwesịghị ịgbagwoju okwu ahụ anya na onye na achịkwa mbara igwe, elekere dị elu ma ọ bụghị ya, elekere pendulum nkịtị nke a na eji na ụlọ nyocha.
Oge elekere ndị na enyocha mbara igwe na anọchite anya Usoro anyanwụ site na iji ihe nlereanya geocentric. A na ejikarị diski ma ọ bụ okirikiri na anọchite anya ụwa, nke dị n'etiti usoro anyanwụ, akara n'etiti etiti nke akara ahụ. A na anọchite anya anyanwụ site na okirikiri ọla edo (dị ka ọ pụtara na mbụ na Usoro Antikythera, laa azụ na narị afọ nke abụọ BC), gosipụtara na ọ na agba gburugburu ụwa otu ugboro n'ụbọchị gburugburu awa iri abụọ na anọ. Echiche a kwekọrọ na ahụmịhe kwa ụbọchị na echiche ụwa nke Europe tupu oge Copernican.