Having thus assumed the motions which I ascribe to the earth, I have, after long and careful investigation, finally discovered that, if the motions of the other planets be related to the revolution of the earth, and be calculated to the same period, not only do the phenomena of these motions follow therefrom, but also the order and magnitudes of all the planets and spheres, and the heaven itself, are so bound together that in no portion of it can anything be moved without disrupting the order of all the other parts and of the whole universe.
— Nicolaus Copernicus
Early Modern
Heliocentric model of the solar system
