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
Superman and the Legion of Super-Heroes After blacking out, Superman awakens and is confronted by Brainiac 5, who reveals that his dictatorship of the planet is fabricated as a way to keep Colu, which is the strategic beachhead of a proposed United Planets attack on Earth, from completing their plans. On Earth, Chameleon Girl sneaks into the Justice League's headquarters, and discovers that they captured Sun Boy and placed him into a machine that uses his powers to tint the sun red. Superman, Brainiac 5, and Colossal Boy find the other Legionnaires and the crystal data tablet containing the false claims regarding Superman's origins. Earth-Man reveals