| Risultati della ricerca nelle immagini - "Albategnius" |
Albategnius-1.jpgAlbategnius Crater (1)162 visiteAlabategnius: un grande cratere del diametro di circa 120 km e con pareti (o murate) che arrivano sino a 4000 mt. Le sue coordinate sono: Lat. 12 Sud e Long. 4 Est. La sua posizione nella Regione Centrale della Luna, una Regione caratterizzata (in buona misura) da grandi bacini d'impatto.
Albateignus non difficile da localizzare - leggermente ad Est del Cratere Ptolemaeus.
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Albategnius-2.jpgAlbategnius Crater (2)151 visiteAlbategnius (Al-Battani, Muhammad ibn Jabir) (approx. 850-929)
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An Iraqi prince, born in Batan, Mesopotamia (Iraq), who was the leading Astronomer and Mathematician of his time. He drew up improved tables of the Sun and Moon, measured the eccentricity of Earths orbit and the inclination of Earths Equator to its orbital plane. He was capable of making an extremely accurate measurement of the length of the Earth year - which was also used in the Gregorian reform of the Julian Calendar. His observations at Rakku, made over (probably) a 40-year period, were summarized in his work "Movements of the Stars" (first published in Europe in 1537).
Thanks to his contribution, Johannes Hevelius (1611-1687) was able to theorize and discover the secular variation in the Moons motion.
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