In astronomical observation, there are a lot of "gravitational anomalies" that cannot be explained by the current theories of gravity. Therefore, it is of great significance to study the influence of the motion of various space particles on the forming force. Based on the particle radiation emitted by stars, I deduced three formulas on the repulsion of stars and wrote this book on them. When there is a force, there must be an entity applying said force. I have pondered: the theory that mass itself creates gravitation does not make sense from the point of view of the law of Conservation of Energy. The further corollary is that there is also an external actor on the force of gravitation besides mass. After much thought and based on the characteristics of gravity, I believe the gravitational force between two objects is caused by the mysterious set of subatomic elementary particles that I am terming "strongly transmissive particles" diffusing in space. Although we have difficulty in detecting them comprehensively at present, we cannot rush to deny their existence and function. Neutrinos are typical example of strongly transmission particles, especially tau neutrino ( ). is a master of invisibility. It is the most likely one to cause gravitation. Now, we don't know for sure the flux of neutrinos in the universe. So it is too early to accept that the Big Bang theory is entirely correct until a more compelling theory of gravity is found. In March 2013, I established the analysis model for the interactions of the strongly transmissive particles acting between two objects and re-deduced the gravity formula. When I deduced the formula to the format of, the universal gravitational constant is nowhere to be seen. Instead, there were seven factors that showed up in the precious seat of . This new gravity formula may give valuable answers to some long pending cases in the theory of gravity. The components of the comprehensive force of the stars and their peripheral celestial bodies are different from that of the planet and their peripheral celestial bodies, mainly because of the repulsion of the stars. That is to say, the force components (including gravity, radiation repulsion, rotating centrifugal force, and normal force from the ground, etc.) of the earth and its "apple" are different from that of the sun and its "apple," which represents the planets and asteroids in the solar system. This is why we call this book " Apple of the Sun." The content of this book intend to prove that the in the equation for Newton's law of universal gravitation, we used to recognize as a "constant value," should not be a constant. The author came up with this core theory and intends to prove it from a certain angle throughout this book. This book is dedicated to the vast number of scientific workers to facilitate discussion on the mystery of gravity.