character: Aristotle
topic: Early Theories of Celestial Bodies
subject: Science
LearnActions
SearchCreate
character: Ptolemy
topic: Geocentric Model of the Universe
subject: Science
LearnActions
SearchCreate
character: Copernicus
topic: Heliocentric Theory
subject: Science
LearnActions
SearchCreate
character: Galileo
topic: Observational Astronomy and Celestial Bodies
subject: Science
LearnActions
SearchCreate