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Ptolemy
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How did Ptolemy explain retrograde motion?
Ptolemy Ptolemaic system Ptolemy's Geographia world map derived from Ptolemy's Geographia frontispiece to Galileo's Dialogue Concerning the Two Chief World Systems, Ptolemaic & Copernican Epitome of the Almagest mathematicians of the Greco-Roman world Ptolemy's map of the world, as printed at Ulm, Ger., 1482.
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Ptolemy summary
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View of the Andromeda Galaxy (Messier 31, M31).
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Michael Faraday (L) English physicist and chemist (electromagnetism) and John Frederic Daniell (R) British chemist and meteorologist who invented the Daniell cell.
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Equations written on blackboard
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Nicolaus Copernicus. Nicolas Copernicus (1473-1543) Polish astronomer. In 1543 he published, forward proof of a Heliocentric (sun centered) universe. Coloured stipple engraving published London 1802. De revolutionibus orbium coelestium libri vi.
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Ptolemy: Facts & Related Content

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Facts

Also Known As Ptolemy of Alexandria • Claudius Ptolemaeus
Born c.100
Died c.170
Notable Works “Almagest” • “Guide to Geography” • “Hypotheseis ton planomenon” • “Optica”
Subjects Of Study Ptolemaic system • calendar • light • projection • refraction

Photos and Videos

Ptolemy
Ptolemaic system
Ptolemy's Geographia
world map derived from Ptolemy's Geographia
frontispiece to Galileo's Dialogue Concerning the Two Chief World Systems, Ptolemaic & Copernican
Epitome of the Almagest
mathematicians of the Greco-Roman world
Ptolemy's map of the world, as printed at Ulm, Ger., 1482.
How did Ptolemy explain retrograde motion?
How we understood the universe throughout history
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Quiz
Nicolaus Copernicus. Nicolas Copernicus (1473-1543) Polish astronomer. In 1543 he published, forward proof of a Heliocentric (sun centered) universe. Coloured stipple engraving published London 1802. De revolutionibus orbium coelestium libri vi.
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