![]() ![]() Joshua bade the sun stand still-which would not be notable were it already at rest.David in Psalm 89: God has founded the earth and it shall not be moved.So why did people at the time belive in Copernicus? Reasons for asserting the earth is motionless: Lack of parallax because fixed stars are very far away Motion of Mercury & Venus "unlocked" from sun. Changing brightness during year so need to introduce epicyclesĬOPERNIKUS (1473-1543) Ptolemy by now required 40 epicycles: Orbits circular (so still need epicycles).Mercury & Venus never get far from sun.Since the separation between the stars doesn't change, the earth must be stationary Why the earth must be stationary: Suppose that the earth revolved round sun. Why do you believe the earth orbits the sun? (Very hard) Why do you believe the earth orbits the sun? Aristotle Why the Earth is not flat:.(Hard) Why do you believe the earth rotates?.(Easy) Why do you believe the earth is not flat?.It is not possible for every generation of scientists to check every result, so the question is "why do we believe what we believe?" The Ptolemaic Model of the Solar System.Usually the scientific method works in the end, but prejudice, preconceptions, racism and plain stupidity have hindered scientific progress.Examples include Also, correct ideas have taken a very long time to be accepted. In many cases, the wrong ideas have simply been forgotten. We can learn a lot by looking at the history of wrong ideas. How do we know what is "right" in Science If your browser supports JavaScript, be sure it is enabled. Warning: jsMath requires JavaScript to process the mathematics on this page. ![]()
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