In the process of pursuing the truth, Copernicus and Galileo showed their spirit of not blindly following authority or superstitious dogma, and sacrificing their lives in pursuit of the truth and insisting on the truth.

Polish scientist Copernicus proposed the heliocentric theory based on the astronomical observations and calculations of his predecessors, which changed mankind's understanding of the universe and was of epoch-making significance in the history of scientific development. Nicolaus Copernicus was a Polish astronomer, mathematician, doctor of canon law, and priest during the Renaissance. Based on the astronomical observations and calculations of his predecessors, he proposed the heliocentric theory, which changed mankind's understanding of the universe and was of epoch-making significance in the history of scientific development.

The Italian scientist Galileo built the world's first astronomical telescope and observed many strange landscapes invisible to the naked eye, proving the new astronomical theory.

What is the scientific significance of Galileo's famous "iron ball experiment"? ?

The story of Galileo’s gravity experiment at the Leaning Tower of Pisa: In Aristotle’s time, it was generally believed that heavier objects fell first than lighter objects. Galileo dropped two objects from the Leaning Tower of Pisa at the same time. Iron balls of different weights fell at the same time, which proved that the speed of an object falling has nothing to do with its mass, so Galileo's experiment proved that people's previous ideas were wrong.

Galileo's conclusion is correct for his iron ball experiment, because the influencing factors he considered have the main influence there, and other factors can be ignored. In other cases, when other factors become non-negligible, the conclusion does not apply. The development of science is a process in which people gradually reduce approximations and move closer to reality.