Definition of Copernican system in English:

Copernican system

Line breaks: Co¦per|ni¦can sys¦tem
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.
More 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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