Apparently there are only two major political parties there.
Explanation:
Copernican heliocentrism is the name given to the astronomical model developed by Nicolaus Copernicus and published in 1543. This model positioned the Sun at the center of the Universe, motionless, with Earth and the other planets orbiting around it in circular paths, modified by epicycles, and at uniform speeds.
Hey You!
The primary purpose of these conventions is to select the party's nominee President.