The Tychonic system, named after the Danish astronomer Tycho Brahe, is a model of the cosmos that combines aspects of both the geocentric (Earth-centered) and heliocentric (Sun-centered) models of the universe. Developed in the late 16th century, it was proposed at a time when the heliocentric model of Copernicus was gaining attention but had not yet been universally accepted.
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A geoheliocentric arrangement with the Sun circling a stationary Earth and other planets circling the Sun. It can reproduce the phases of Venus without an orbiting Earth.