基于光速原理的质量体引力性分析

he derivation process of the dimensional relationship "energy≡mass×speed×speed" is presented. Newton's second law of motion is derived from the basic dimensional relationships. Gravitation is one of the intrinsic properties of mass body. The law of gravitation in general form is introduced. The special case is Newton's law of universal gravitation. The dynamic change of gravity makes the evolution of the universe present a cycle of light speed → non light speed. The influence of gravitation on the behavior of photons is discussed.The concept of fundamental gravitational intrinsic constant (Γ) is proposed. Its basic meaning is how much N (Newton) the gravity corresponding to 1kg mass is. The fundamental gravitational intrinsic constant Γ is directly proportional to the product of gravitational constant G and Planck's constant, and inversely proportional to the light speed; its dimension is N/kg and its value is estimated to be Γ=ζ ×1.4798×10^(-52)(N/kg), in which ζ is a constant coefficient to be determined. The conservation of gravity and the infinite dilubility of gravity are discussed. The relationship between gravity and time is analyzed.