What is the ptolemy theory?

The Ptolemaic theory, or Ptolemaic system, also known as the geocentric model, is a defunct astronomical model that describes the apparent motion of celestial objects around Earth. It was developed by the Greek astronomer Claudius Ptolemy (c. 90 – c. 168 AD) in his work the Almagest.

The Ptolemaic system assumes that Earth is stationary at the center of the universe and that all other celestial objects, including the Sun and Moon, orbit Earth in circles or epicycles. This model was based on the observations of the ancient Greek astronomers, who saw that the Sun, Moon, and stars appeared to move in a pattern that could be described using circles.

The Ptolemaic system was widely accepted for over 1,500 years, from antiquity until the 16th century, when it was replaced by the heliocentric model developed by Nicolaus Copernicus. Copernicus proposed that the Sun was at the center of the universe and that Earth and the other planets orbited the Sun.

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What materials were used to construct the Roman Bridge At Alcantara?

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The Dokós wreck, the oldest shipwreck found by archaeologists
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During the Middle Ages, not all plague victims were placed in mass graves
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Rare Roman-era wooden sculpture unearthed in UK
A very rare wooden sculpture dating from Roman times has just been found in the London outback. A treasure that adds to the long list of discoveries made in recent years on the huge construction site of a new high-speed train line, the HS2. The wooden statue, carved from a single piece of wood, is