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Pages from 1550 Annotazione on Sacrobosco's De sphaera mundi, showing the Ptolemaic system. In the Ptolemaic system, each planet is moved by a system of two spheres: one called its deferent; the other, its epicycle. The deferent is a circle whose center point, called the eccentric and marked in the diagram with an X, is distant from the Earth.
In the Hipparchian, Ptolemaic, and Copernican systems of astronomy, the epicycle (from Ancient Greek ἐπίκυκλος (epíkuklos) 'upon the circle', meaning "circle moving on another circle") [1] was a geometric model used to explain the variations in speed and direction of the apparent motion of the Moon, Sun, and planets.
Bunnies and Easter Eggs Coloring Page. iStock. 10. Mandala Easter Egg Coloring Page. iStock. 11. Easter Printable Maze. ... Food & Wine. This postcard-worthy port in Italy promises seafood, pasta ...
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Notable features of Ptolemy's map is the first use of longitudinal and latitudinal lines as well as specifying terrestrial locations by celestial observations. The Geography was translated from Greek into Arabic in the 9th century and played a role in the work of al-Khwārizmī before lapsing into obscurity. The idea of a global coordinate ...
After you're done coloring your eggs, you can display them right inside of the egg carton on top of grass you grow using the included "eco-coconut husk pucks." Shop Now Natural Easter Egg Coloring Kit
Reigning for 275 years, the Ptolemaic was the longest and last dynasty of ancient Egypt from 305 BC until its incorporation into the Roman Republic in 30 BC. [ 6 ] [ 7 ] Ptolemy , a general and one of the somatophylakes (bodyguard companions) of Alexander the Great , was appointed satrap of Egypt after Alexander's death in 323 BC.