Tychonic system(redirected from Tychonian system)
Tychonic system(tÿ-kon -ik) A model of the Solar System proposed by Tycho Brahe in the 1580s and based on observations he made in order to test the Copernican system. He concluded that the Sun and Moon revolved around the Earth, which he maintained lay at the center of the Solar System, but suggested that the other planets orbited the Sun.
Tychonic system[tī′kän·ik ‚sis·təm]
A theory of the planetary motion proposed by the astronomer Tycho Brahe in which the earth is stationary, with the sun and moon revolving about it but all the other planets revolving about the sun.