What compelling evidence regarding Venus's motion supported a Sun-centered orbital model?
Answer
He observed that Venus went through a full set of phases, including a 'full' phase.
In the ancient Earth-centered model, Venus should only show crescent phases; observing a full phase requires Venus to orbit the Sun.
Related Questions
What was the prevailing view of the Moon's composition before Galileo's telescopic observations?When did Galileo begin his systematic telescopic observations of the Moon?What specific feature of the lunar shadow line led Galileo to conclude the Moon was rugged?How did the observation of illuminated peaks contrasted with dark valleys help Galileo deduce lunar topography?What mathematical technique did Galileo use to estimate the height of the lunar mountains?What was the philosophical implication of discovering mountains on the Moon?When were Galileo's initial telescopic findings about the Moon formally published?What compelling evidence regarding Venus's motion supported a Sun-centered orbital model?What did the discovery of Jupiter's four largest moons (Medicean Stars) immediately suggest about the structure of the cosmos?What lasting significance did the Moon observations hold for scientific methodology?