character: Galileo Galilei
topic: Planets and their observations
grade: 12
subject: Foreign Language
LearnActions
SearchCreate
character: Carl Sagan
topic: Comparative Planetology
grade: 12
subject: Foreign Language
LearnActions
SearchCreate
character: Nicolaus Copernicus
topic: Heliocentric model of the solar system
grade: 12
subject: Foreign Language
LearnActions
SearchCreate
character: Isaac Newton
topic: Gravitation and its effect on planetary motion
grade: 12
subject: Foreign Language
LearnActions
SearchCreate