An equitorium (plural, equitoria) was an astronomical calculating instrument. It can be used for finding the positions of the Moon, Sun, and planets without calculation, using a geometrical model to represent the celestial body's mean and anomalistic position. It was invented by the Arab mathematician al-Zarqālī known as Arzachel (Latinized) in al-Andalus in the early 11th century.
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- An equitorium (plural, equitoria) was an astronomical calculating instrument. It can be used for finding the positions of the Moon, Sun, and planets without calculation, using a geometrical model to represent the celestial body's mean and anomalistic position. It was invented by the Arab mathematician al-Zarqālī known as Arzachel (Latinized) in al-Andalus in the early 11th century. Richard of Wallingford (1292–1336) is known to have built an equitorium named Albion that was utilized to calculate lunar, solar and planetary longitudes. Albion also predicted eclipses.
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- An equitorium (plural, equitoria) was an astronomical calculating instrument. It can be used for finding the positions of the Moon, Sun, and planets without calculation, using a geometrical model to represent the celestial body's mean and anomalistic position. It was invented by the Arab mathematician al-Zarqālī known as Arzachel (Latinized) in al-Andalus in the early 11th century.
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