Orrery on display in Kassel at the Astronomisch-Physikalisches Kabinett and in Dresden at the Mathematisch-Physikalischer Salon. In "De revolutionibus orbium coelestium", published in Nuremberg in 1543, Nicolaus Copernicus challenged the Western teaching of a geocentric universe in which the Sun revolved daily around the Earth. He observed that some Greek philosophers had proposed a heliocentric universe. This simplified the apparent epicyclic motions of the planets, making it feasible to represent the planets' paths as simple circles. This could be modelled by the use of gears. Tycho Brahe's improved instruments made precise observations of the skies (1576–1601), and from these Johannes Kepler
The Creation of the Sun, Moon and Vegetation another image of God points towards the Sun with his right hand and toward the faint Moon with his left. His face expresses the force needed for the creation of the abode of living beings. The abstract patterns of drapery emphasize the motion of both figures of God. "The Creation of the Sun, Moon and Planets" is featured on the postage stamps of Vatican City (issue of 1994) and India (issue of 1975). The Creation of the Sun, Moon and Vegetation The Creation of the Sun, Moon and Vegetation, (sometimes The Creation of the Sun, Moon, and Plants or The