History of physics to simplify their production. In heliocentric models of the Solar system, the Earth orbits the Sun along with other bodies in Earth's galaxy, a contradiction according to the Greek-Egyptian astronomer Ptolemy (2nd century CE; see above), whose system placed the Earth at the center of the Universe and had been accepted for over 1,400 years. The Greek astronomer Aristarchus of Samos (c.310 – c.230 BCE) had suggested that the Earth revolves around the Sun, but Copernicus' reasoning led to lasting general acceptance of this "revolutionary" idea. Copernicus' book presenting the theory ("De revolutionibus orbium coelestium", "On the Revolutions of the
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