What physical observation directly contradicted the main assertion of the Ptolemaic geocentric system?
Answer
Satellites clearly revolving around Jupiter
The Ptolemaic view mandated that all celestial motion must center on the Earth; the existence of satellites revolving around Jupiter demonstrated that the Earth was not the fixed, singular center point.
Related Questions
What astronomical framework, championed by Ptolemy, was the accepted standard for centuries?In what year did Galileo Galilei first turn his telescope skyward and observe the moons of Jupiter?What name did Galileo initially give to the four newly discovered celestial objects orbiting Jupiter?What physical observation directly contradicted the main assertion of the Ptolemaic geocentric system?Galileo’s observations facilitated a fundamental shift in scientific authority away from which sources?How did the heliocentric model explain the existence of Jupiter's moons more economically than the geocentric model?What concept did observing Jupiter holding four moons in orbit help observers grasp as a universal principle?What crucial element did Galileo’s discovery provide that Copernicus’s earlier proposal lacked?What was the critical technological enabler for Galileo's world-changing observation?What further observation, also requiring the telescope, was needed to cement the proof for the heliocentric model?