Galileo galilei (1564 ~ 1642) was a great astronomer, mechanic, philosopher, physicist, mathematician and scientist in the late Italian Renaissance. 1590 made the famous experiment of "two iron balls landing at the same time" on the leaning tower of Pisa, which overthrew Aristotle's theory that the falling speed of an object is proportional to its weight.

Descartes 3 1596 was born in Dulan, France, and 1650 died in Stockholm, Sweden in February. Descartes was a great philosopher, physicist, mathematician and physiologist. In the second chapter of Principles of Philosophy, Descartes took the first and second nature as his theme. Here, he emphasized the linearity of inertial motion that Galileo did not explicitly express.

Sir isaac newton (1642, 65438+February 25th-65438+March 30th, 0727) was an English physicist, mathematician, astronomer, natural philosopher and alchemist. In the paper Mathematical Principles of Natural Philosophy published in 1687, he described gravity and three laws of motion. These descriptions laid the scientific view of the physical world in the next three centuries and became the basis of modern engineering. By demonstrating the consistency between Kepler's law of planetary motion and his theory of gravity, he showed that the movements of ground objects and celestial bodies all follow the same natural law; Thus, the last doubt about the sun center was eliminated and the scientific revolution was promoted.