ptolemaic system wikipedia - EAS

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  1. Ptolemaic system, also called geocentric system or geocentric model, mathematical model of the universe formulated by the Alexandrian astronomer and mathematician Ptolemy about 150 CE and recorded by him in his Almagest and Planetary Hypotheses.
    www.britannica.com/science/Ptolemaic-system
    www.britannica.com/science/Ptolemaic-system
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    What is the Ptolemaic model?
    Ptolemaic model. Ptolemy argued that the Earth was a sphere in the center of the universe, from the simple observation that half the stars were above the horizon and half were below the horizon at any time (stars on rotating stellar sphere), and the assumption that the stars were all at some modest distance from the center of the universe.
    en.wikipedia.org/wiki/Geocentric_model
    What is a Ptolemaic graph?
    In graph theory, a Ptolemaic graph is an undirected graph whose shortest path distances obey Ptolemy's inequality, which in turn was named after the Greek astronomer and mathematician Ptolemy.
    en.wikipedia.org/wiki/Ptolemaic_graph
    What is the deferent in 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 removed from the Earth.
    en.wikipedia.org/wiki/Geocentric_model
    What is the Ptolemaic Kingdom?
    The Ptolemaic Kingdom ( /ˌtɒlɪˈmeɪ.ɪk/; Koinē Greek: Πτολεμαϊκὴ βασιλεία, romanized: Ptolemaïkḕ basileía) was a Hellenistic kingdom based in ancient Egypt. It was ruled by the Ptolemaic dynasty, which started with Ptolemy I Soter 's accession after the death of Alexander the Great in 323 BC and which ended with...
    en.wikipedia.org/wiki/Ptolemaic_Kingdom
  3. https://en.wiktionary.org/wiki/Ptolemaic_system

    網頁1902, Charles Kingsley, “Lecture I.The Ptolemaic Era.”, in Alexandria and Her Schools: [T]o Hipparchus we owe that theory of the heavens, commonly called the Ptolemaic system, …

  4. https://en.wikipedia.org/wiki/Ptolemaic_dynasty

    The Ptolemaic dynasty , sometimes referred to as the Lagid dynasty (Λαγίδαι, Lagidae; after Ptolemy I's father, Lagus), was a Macedonian Greek royal dynasty which ruled the Ptolemaic Kingdom in Ancient Egypt during the Hellenistic period. Their rule lasted for 275 years, from 305 to 30 BC. The Ptolemaic was the last dynasty of ancient Egypt.
    Ptolemy, one of the seven somatophylakes (bodyguard companions), a general and possible hal…

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  5. https://en.wikipedia.org/wiki/Ptolemaic_Kingdom

    The Ptolemaic reign in Egypt is one of the best-documented time periods of the Hellenistic era, due to the discovery of a wealth of papyri and ostraca written in Koine Greek and Egyptian.
    In 332 BC, Alexander the Great, King of Macedon, invaded Egypt, which at the time was a satrapy of the Achaemenid Empire known as the Thirty-first Dynasty under Emperor Artaxerxes III. He visited Memphis, and travelled to the oracle of Amun at the Siwa Oasis. The oracle declared him …

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  6. https://en.wikipedia.org/wiki/Geocentric_model
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    The geocentric model entered Greek astronomy and philosophy at an early point; it can be found in pre-Socratic philosophy. In the 6th century BC, Anaximander proposed a cosmology with Earth shaped like a section of a pillar (a cylinder), held aloft at the center of everything. The Sun, Moon, and planets were holes in invisib…
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    • https://www.britannica.com/science/Ptolemaic-system

      網頁Ptolemaic system, also called geocentric system or geocentric model, mathematical model of the universe formulated by the Alexandrian astronomer and mathematician Ptolemy about 150 CE and recorded by …

    • https://en.wikipedia.org/wiki/Ptolemaic

      網頁Ptolemaic system, a geocentric model of the universe developed in detail by the astronomer Claudius Ptolemaeus See also Ptolemy (name) This page was last edited on …

    • https://en.wikipedia.org/wiki/Ptolemaic_graph

      網頁In graph theory, a Ptolemaic graph is an undirected graph whose shortest path distances obey Ptolemy's inequality, which in turn was named after the Greek astronomer and …

    • 地心说 - 维基百科,自由的百科全书

      https://zh.wikipedia.org/wiki/地心说

      網頁地心说,也称为天动说(英語: Geocentric model ),是一种天文学学说。 地心说认为地球是宇宙的中心,而其他的日月星辰都環繞著地球而運行 [1]。 公元2世纪,罗马属埃及的 …

    • Ptolemaic System - Air.Wiki

      https://air.wiki/Ptolemaic_system

      網頁Ptolemaic Terrascope is a magazine covering old and new music, usually of a Psychedelic rock nature. It has been published irregularly since 1989. Originally published by the …

    • https://en.wikipedia.org/wiki/Deferent_and_epicycle

      網頁The path-line is the combined motion of the planet's orbit (deferent) around Earth and within the orbit itself (epicycle). In the Hipparchian, Ptolemaic, and Copernican systems of astronomy, the epicycle (from Ancient Greek …

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