Copernicus is often described as a lone astronomer who defiantly argued that the sun, not the Earth was at the center of the cosmos. Copernicus' contributions to astronomy are so significant that they warrant their own term: The Copernican Revolution.
, Brahe put forward a new model for the cosmos. In Brahe's model, all of the planets orbited the sun, and the sun and the moon orbited the Earth. Keeping with his observations of the new star and the comet, his model allowed the path of the planet Mars to cross through the path of the sun.
Kepler worked for Tycho Brahe, publishing an extensive amount of Brahe's data in Rudolphine Tables. Although he used much of that data for his own publications Kepler's work would significantly depart from Brahe's.
