Copernican system
Pronunciation: /kəˈpəːnɪk(ə)n/
(also Copernican theory)
noun
Astronomy- 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.
Origin:
mid 17th century: named after Copernicus (see Copernicus, Nicolaus)