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Ptolemy:
(AD 100?-170?), astronomer and mathematician, whose astronomical theories and explanations dominated scientific thought until the 16th century.
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Illustration of Ptolemaic System (Mary Evans Picture Library/Photo Researchers, Inc.)Illustration of Ptolemaic System (Mary Evans Picture Library/Photo Researchers, Inc.)
Illustration of Ptolemaic System
Celestial Models by Ptolemy and Copernicus (Photo Researchers, Inc.)Celestial Models by Ptolemy and Copernicus (Photo Researchers, Inc.)
Celestial Models by Ptolemy and Copernicus
Ptolemy I (Erich Lessing/Art Resource, NY)Ptolemy I (Erich Lessing/Art Resource, NY)
Ptolemy I
Ptolemy III (Woodfin Camp and Associates, Inc.)Ptolemy III (Woodfin Camp and Associates, Inc.)
Ptolemy III
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Map of Mount Ptolemy
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  • Ptolemy - Wikipedia, the free encyclopedia

    Claudius Ptolemaeus (Greek: Κλαύδιος Πτολεμαῖος Klaúdios Ptolemaĩos; after 83 – 161 AD), known in English as Ptolemy, was an ancient mathematician ...

  • Ptolemy II Philadelphus - Wikipedia, the free encyclopedia

    Reign. He began his reign as co-regent with his father Ptolemy I from 288 BC–285 BC, and maintained a splendid court in Alexandria. Egypt was involved in several wars during his ...

  • Ptolemy

    Studies modeling, simulation, and design of concurrent, real-time, embedded systems. Focus: assembly of concurrent components. Key underlying principle: use of well-defined ...

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