Equitorium

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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 Arzachel in al-Andalus in the early 11th century al-Andalus.^[1] 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.

[edit] References

[edit] See also

• Antikythera mechanism
• Armillary sphere
• Astrarium
• Astrolabe
• Astrology
• Astronomical clock
• Islamic astronomy
• Orrery
• Planetarium
• Prague Orloj
• Sextant
• Sharafeddin Tusi (the inventor of the linear astrolabe)
• Torquetum

[edit] External links

• (English) Richard Wallingford