what is ptolemy
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Quizlet Lists The noun PTOLEMY has 2 senses: 1. Alexandrian astronomer who proposed a geocentric system of astronomy that was undisputed until Copernicus (2nd century AD) 2. an ancient dynasty of Macedonian kings who ruled Egypt from 323 BC to 30 BC; founded by Ptolemy I and ended with Cleopatra. Familiarity information: PTOLEMY used as a noun is rare.
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The Physician The Physician is a novel by Noah Gordon. It is about the life of a Christian English boy in the 11th century who journeys across Europe in order to study medicine among the Persians. The book was initially published by Simon & Schuster on August 7, 1986.
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- Laid the foundation for modern astronomy. Nicolaus Copernicus was a Polish astronomer who put forth the theory that the Sun is at rest near the center of the Universe, and that the Earth, spinning on its axis once daily, revolves annually around the Sun. This is called the heliocentric, or Sun-centered, system.aid the foundation for modern astronomy. Nicolaus Copernicus was a Polish astronomer who put forth the theory that the Sun is at rest near the center of the Universe, and that the Earth, spinning on its axis once daily, revolves annually around the Sun. This is called the heliocentric, or Sun-centered, system.
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Ancient Egypt In the aftermath of Alexander the Great 's death, one of his generals, Ptolemy Soter, established himself as the new ruler of Egypt. This Greek Ptolemaic Kingdom ruled Egypt until 30 BC, when, under Cleopatra, it fell to the Roman Empire and became a Roman province.
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- His theory gave a simple and elegant explanation of the retrograde motions of the planets (the annual motion of the Earth necessarily projected onto the motions of the planets in geocentric astronomy) and settled the order of the planets (which had been a convention in Ptolemy's work) definitively.
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MATHEMATICIANS WHO CONTRIBUTED IN TRIGONOMETRY Ã¼ Hipparchus â created the science of trigonometry Ã¼ Ptolemy â calculated the table of chords called Hipparchus lived in Nicaea. He defined the chord function, derived some of its properties and constructed a table of chords for angles that are multiples of 7.5° using a circle of radius R = 60 × 360/(2π).This his motivation for choosing this value of R. In this circle, the circumference is 360 times 60.
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- Nicolaus Copernicus was a Polish astronomer who put forth the theory that the Sun is at rest near the center of the Universe, and that the Earth, spinning on its axis once daily, revolves annually around the Sun. This is called the heliocentric, or Sun-centered, system.
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Ancient Egypt Alexander was welcomed as a liberator and conquered Egypt without a fight. He established the city of Alexandria and moved on to conquer Phoenicia and the rest of the Persian Empire. After his death in 323 BCE his general, Ptolemy, brought his body back to Alexandria and founded the Ptolemaic Dynasty (305-30 BCE).n the early Old Kingdom, Egypt was simply known as 'Kemet' which means 'Black Land' so named for the rich, dark soil along the Nile River where the first settlements began. Later, the country was known simply as Misr which means 'country', a name still in use by Egyptians for their nation in the present day.
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Pharaoh Pharaoh (/ˈfeɪ.roʊ/, /fɛr.oʊ/ or /fær.oʊ/) is the common title of the monarchs of ancient Egypt from the First Dynasty (c. 3150 BCE) until the Macedonian conquest in 305 BCE, although the actual term Pharaoh was not used contemporaneously for a ruler until circa 1200 BCE.
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Geocentric model In astronomy, the Geocentric model (also known as Geocentrism, or the Ptolemaic system) is a superseded description of the universe with the Earth at the center. Under the geocentric model, the Sun, Moon, stars, and planets all circled Earth. The geocentric model served as the predominant description of the cosmos in many ancient civilizations, such as those of Aristotle and Ptolemy. Two observations supported the idea that the Earth was the center of the Universe.
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Ancient Egypt Alexander was welcomed as a liberator and conquered Egypt without a fight. He established the city of Alexandria and moved on to conquer Phoenicia and the rest of the Persian Empire. After his death in 323 BCE his general, Ptolemy, brought his body back to Alexandria and founded the Ptolemaic Dynasty (305-30 BCE).
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Early Astronomers: Ptolemy, Aristotle, Copernicus, and Galileo Ptolemy was an astronomer and mathematician. He believed that the Earth was the center of the Universe. The word for earth in Greek is geo, so we call this idea a geocentric theory.
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The Ptolemaic Model Claudius Ptolemy lived in Rome around 100 AD. His model of the solar system and heavenly sphere was a refinement of previous models developed by Greek astronomers. Ptolemys major contribution, however, was that his model could so accurately explain the motions of heavenly bodies, it became the model for understanding the structure of the solar system.
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- The Earth Revolves Around the Sun Before Galileo, people believed the earth was the center of the universe and the sun revolved around the earth. This theory is known as the Ptolemaic theory. It is named after the Roman astronomer Ptolemy.
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Ptolemaic dynasty Unlike their previous rulers under the Achaemenid Empire, they usually lived in Egypt. Ptolemy's family ruled Egypt until the Roman conquest of 30 BC. All the male rulers of the dynasty took the name Ptolemy. Ptolemaic queens, some of whom were the sisters of their husbands, were usually called Cleopatra, Arsinoe or Berenice.
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Esoteric Christianity: The Greek Mystery Religions and Their Impact on Christianity Here are some examples. In Alexandria Ptolemy IV Philopator (reigned 221-205 BCE) was a devotee of Dionysus. In Rome Emperor Augustus (reigned 44 BCE to 14 CE) was an initiate of the Eleusinian Mysteries and a devotee of Apollo. Under his rule, in 28 BCE, a splendid temple of Apollo was built on the Palatine Hill.
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- n. 1. (Astronomy) the theory of planetary motion developed by Ptolemy from the hypotheses of earlier philosophers, stating that the earth lay at the centre of the universe with the sun, the moon, and the known planets revolving around it in complicated orbits.
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Geocentric system Geocentric system, any theory of the structure of the solar system (or the universe) in which Earth is assumed to be at the centre of all. The most highly developed geocentric system was that of Ptolemy of Alexandria (2nd century ce). It was generally accepted until the 16th century, after which it was superseded by heliocentric models such as that of Nicolaus Copernicus.
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- In his great astronomical work, Almagest, [2] Ptolemy presented a complete system of mathematical constructions that accounted successfully for the observed motion of each heavenly body. Ptolemy used three basic constructions, the eccentric, the epicycle, and the equant.
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Lyra Lyra is a constellation in the northern hemisphere. It was introduced by the Greek astronomer Ptolemy in the 2nd century. The constellation is associated with the ancient Greek myth of Orpheus, the great musician killed by the Bacchantes. Orpheus carried with him the first lyre ever made, invented by Hermes and given to him by the god Apollo.
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Claudius Ptolemy In the Almagest, Ptolemy wrote of his mathematical studies regarding the motions of the planets, the sun and the moon. He presented the so-called geocentric theory, which stated that the earth was the center of the solar system, and that the other planets and the sun revolved around it.
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- Nicolaus Copernicus was a Polish astronomer who put forth the theory that the Sun is at rest near the center of the Universe, and that the Earth, spinning on its axis once daily, revolves annually around the Sun.This is called the heliocentric, or Sun-centered, system.icolaus Copernicus was a Polish astronomer who put forth the theory that the Sun is at rest near the center of the Universe, and that the Earth, spinning on its axis once daily, revolves annually around the Sun.
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Euclidean geometry Euclidean geometry is a mathematical system attributed to the Alexandrian Greek mathematician Euclid, which he described in his textbook on geometry: the Elements. Euclid's method consists in assuming a small set of intuitively appealing axioms, and deducing many other propositions (theorems) from these.
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Ptolemy XII Auletes His reign as king was interrupted by a general rebellion that resulted in his exile from 58 to 55 BC. Thus, Ptolemy XII ruled Egypt from 80 to 58 BC and from 55 BC until his death in 51 BC. Ptolemy XII was generally described as a weak, self-indulgent man, a drunkard, and a music lover.
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- Ptolemy's constellations are the basic set of classical constellations from which modern constellations of the northern hemisphere sky are derived. These classical constellations include the Zodiac constellations. 1  They are used in astrology.