Copernican system
Concise Oxford English Dictionary © 2008 Oxford University Press:
Copernican system /kəˈpəːnɪk(ə)n/ (also Copernican theory)
▶noun Astronomy the theory proposed by Nicolaus Copernicus that the sun is the centre of the solar system, with the planets (including the earth) orbiting round it. Compare with Ptolemaic system.
'Copernican system' also found in these Oxford entries:

