De revolutionibus

Constellation engravings from the Stellarium project's modern sky culture, used under the Free Art License — attribution required, and derivatives must carry the same licence.

Stars sit at their true distances. Move Earth right across its orbit and not one of them shifts. That absent parallax is what Tycho used to argue Copernicus was wrong — and he was right about the measurement, wrong about the conclusion. The stars were simply further away than anyone had dared imagine.