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 House of the Rising Sun that the song is about a woman who killed her father, an alcoholic gambler who had beaten his wife. Therefore, the House of the Rising Sun may be a jailhouse, from which one would be the first person to see the sunrise (an idea supported by the lyric mentioning "a ball and chain," though that phrase has been slang for marital relationships for at least as long as the song has been in print). Because women often sang the song, another theory is that the House of the Rising Sun was where prostitutes were detained while being treated for syphilis.