Galileo’s famous scientific quotes are:

1. The pursuit of science requires special courage.

2. Truth has such power. The more you want to attack it, the more your attacks will enrich and prove it.

3. Scientific truth should not be found in the dusty books of ancient saints, but should be found in experiments and theories based on experiments.

4. If scientists are intimidated by power, science will become a cartilage patient.

5. The only purpose of science is to alleviate the suffering of human existence, and scientists should consider the majority of people.

6. Life is like an anvil. The more it is struck, the more sparks it can emit.

Galileo’s main contributions

1. Mechanics

Galileo was the first scientist to introduce experiments into mechanics. He used a combination of experiments and mathematics to determine some important laws of mechanics. Galileo made detailed research on the basic concepts of motion, including center of gravity, speed, acceleration, etc. and gave strict mathematical expressions. In particular, the introduction of the concept of acceleration is a milestone in the history of mechanics.

2. Astronomy

He was the first scientist to use telescopes to observe celestial bodies and achieve a lot of results. These achievements include: the discovery that the surface of the moon is uneven, that Jupiter has four satellites (now called Galilean satellites), sunspots and the rotation of the sun, the waxing and waning phenomena of Venus and Jupiter, and that the Milky Way is composed of countless stars. He used experiments to confirm Copernicus' "earthquake theory" and completely negated the "celestial movement theory" of Aristotle and Ptolemy, which had ruled for more than a thousand years.

3. Philosophy

He insisted on fighting against idealism and the scholasticism of the church throughout his life, advocating the use of specific experiments to understand the laws of nature, and believed that experiments are the source of theoretical knowledge. He does not admit that there is absolute truth and the absolute authority to grasp the truth in the world, and opposes blind superstition. He acknowledges the objectivity, diversity and infinity of matter. These views are of great significance to the development of materialist philosophy.

4. Thermal Science

The earliest thermometer was invented by the Italian scientist Galileo Galilei (1564-1642) in 1593. His first thermometer.

5. Principle of relativity

Based on the discovery of the law of inertia, Galileo proposed the principle of relativity: the laws of mechanics are equivalent in all inertial coordinate systems. The mechanical process is exactly the same for stationary inertial frames and moving inertial frames.