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Ptolemaic system
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Ptolemaic system geocentric system
How did Ptolemy explain retrograde motion?
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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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Ptolemaic system
geocentric system
How did Ptolemy explain retrograde motion?
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Key People

How did Ptolemy explain retrograde motion?
Ptolemy
Egyptian astronomer, mathematician, and geographer
Georg von Peuerbach
Austrian mathematician

Related Quizzes and Features

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.
All About Astronomy