Ptolemaic system

English

Etymology

From Ptolemy (a surname) + -a- + -ic + system. After Greek-Roman astronomer Claudius Ptolemy (c. 90 - c. 168 AD), who explained the theory in an influential work.

Proper noun

Ptolemaic system

  1. (astronomy) A geocentric model of the solar system, described by the eponymous astronomer.

See also

References

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