Copernican Revolution Earth from the center of the universe, set the heavenly bodies in rotation around the Sun, and introduced Earth's daily rotation on its axis. While Copernicus's work sparked the "Copernican Revolution", it did not mark its end. In fact, Copernicus's own system had multiple shortcomings that would have to be amended by later astronomers. Tycho Brahe (1546–1601) was a Danish nobleman who was well known as an astronomer in his time. Further advancement in the understanding of the cosmos would require new, more accurate observations than those that Nicolaus Copernicus relied on and Tycho made great strides in this area.
Stellar triangulation worldwide, and is now a permanent service of IUGG and IERS. The photographic observations as done 1959–1985 are irrelevant now because of their expense, but lead to some renaissance by electro-optical techniques like CCD. Stellar triangulation Stellar triangulation is a method of geodesy which uses cosmic instead of terrestrial targets. It was first done by the Finnish geodesist Väisälä in 1959, who made astrometric photographs of the sky at two stations together with a balloon probe between them. Even this first step showed the potential of the method, because Väisälä got the azimuth between Helsinki and Turku (a distance of