character: Nicolaus Copernicus
topic: Heliocentric Theory
subject: Science
LearnActions
SearchCreate
character: Galileo Galilei
topic: Support for Heliocentric Theory
subject: Science
LearnActions
SearchCreate
character: Johannes Kepler
topic: Planetary Motion
subject: Science
LearnActions
SearchCreate
character: Isaac Newton
topic: Laws of Motion and Universal Gravitation
subject: Science
LearnActions
SearchCreate