On this day, 298 years ago, on March 31, 1727 (March 9, 1727 lunar calendar), the epoch-making scientific giant Sir Isaac Newton died. Newton resembled Sir Isaac Newton (December 25, 1642 Julian Calendar - March 20, 1727 Gregorian Calendar January 4, 1643 - March 31, 1727). Newton in his boyhood showed the ability to make exquisite machinery by hand. In Costa Cathedral in England, there is still a sun clock, similar to the Chinese "sundial". Although it is still roughly carved, it has shown the wisdom and ideals of Newton's boyhood. Due to his poverty, Sir Isaac Newton's mother asked Newton to drop out of school and go back to work as a farmer, but he still focused on his studies. His uncle found that he was not learning to work to support his family, so he said to him: "Go back to your books! Either you are a big waste with nothing to do, or you are a big genius!" So Newton went to Trinity College, Cambridge University to study. He vowed to devote his life to the cause of science. He studied mathematics, physics, astronomy and other courses hard, and accepted the natural science theories and research methods of Copernicus, Kepler, Galileo, and Descartes, which laid a solid theoretical foundation for his future scientific research. After receiving a bachelor's degree and a master's degree at Cambridge University, Newton stayed on to become a professor of mathematics. Since then, he has been teaching and researching at Cambridge University for 30 years. His brilliant scientific achievements are all made here. Newton worked so hard, sleeping and eating, working 17-18 hours a day in the laboratory, that the director of the Cambridge University Librarian said Newton was "a very abnormal guy". It is because of his whole-hearted spirit that he continues to make new achievements and his status in science is getting higher and higher. His first sensational achievement was the discovery of the essence of light, that is, he discovered that ordinary white light is composed of seven colors of light. He built the first reflecting astronomical telescope that is still used in observatories today. His other great invention was the creation of mathematical calculus. And his greatest discovery was in the field of mechanics. In 1687, Newton published "The Mathematical Principles of Natural Philosophy". This epoch-making treatise stated the three laws of motion of objects: the law of inertia, the law of the relationship between forces and motion, and the law of action and reaction. The law of universal gravitation was also described. According to the law of universal gravitation, Newton studied the laws of motion of the planets, moons and comets in the solar system. Newton is also considered the greatest astronomer. The book "The Mathematical Principles of Natural Philosophy" caused a sensation in society and made Newton famous. But not many people really understand this work. In order to understand the complex mathematical problems in the book, a philosopher asked Newton to make a "must-read list". When he saw the book, the philosopher said: "Just reading these books will take most of my life." Newton died in London on March 31, 1727. The church held a grand state funeral for him, and he was buried in the cemetery of Westminster Abbey for his outstanding contributions to science. Newton's tomb