Definition of Copernican system in English:

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Copernican system

Pronunciation: /kəˈpəːnɪk(ə)n/
(also Copernican theory)


The theory that the sun is the centre of the solar system, with the planets (including the earth) orbiting round it. Compare with Ptolemaic system.
Example sentences
  • We are in the position of medieval astronomers who fear that if the Copernican theory of the solar system is true, ‘the earth’ as we have conceived it does not exist.
  • He also became an advocate of the controversial Copernican theory of the solar system, which he often defended in public debates.
  • Making the orbits elliptical made the Copernican system more accurate.


Mid 17th century: named after Copernicus (see Copernicus, Nicolaus).

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