|
The Tychonian system was an effort by Tycho Brahe to
create a model that allows for observations such as the phases of Venus within a geocentric model. In the Tychonian system,
the Earth is in the center of the universe, the sun revolves
around the earth and the other planets revolve around the sun. It can be shown through
a geometric argument that the motions of the planets and the sun relative to the Earth in the Tychonian system are equivalent to
the motions in the Copernican system, and the Tychonian
system has the advantage of not predicting parallax which was not observable in the
16th century.
Ultimately the Tychonian system was rejected along with the Copernican system by the observations of Johannes
Kepler who demonstrated that the orbits of the planets are ellipses and not circles.
|