Abstract:In this paper, we show that harmonic analysis results of solid tide observations cannot confirm that gravitational interaction speed is the same as the speed of light. First, from the aspects of the theory of gravity tide, the solid tide theory value and the observed value are synchronized. There is no time lag in harmonic analysis. Second, celestial tidal force is only related to gravitation and has nothing to do with the speed of light. Third, tidal factors only reflect the physical changes in the earth’s medium and the phase difference reflects the elasticity and viscosity of the viscoelastic medium; they have nothing to do with the time lag between universal gravitation and light. Fourth, during the concrete process of analysis, there are too many artificial astronomical operations of corrections, and some corrections may be used improperly in two papers of professor Tang and professor Luo. Fifth, gravity and gravitational waves are two different concepts. Gravity is a spatial property in the interaction of two objects, it is an attribute of the two interacting objects, which does not propagate; Gravity waves are space-time ripples, under specified conditions, which radiation of waves from an oscillating source at the speed of light, and energy loss via radiation of gravitational waves. It is pointed out that the theory of earth tide implies two hypotheses: the speed of gravity is the same as the speed of light, and the time lag between universal gravitation and light is the same as the phase difference of harmonic analysis results, as in two papers of professor Tang and professor Luo. The two hypotheses are incorrect, and the conclusion that gravitation is transmitted at the speed of light cannot be established.Gravity doesn’t take time to propagate.
LIU Xuyan,WANG Ziyan. Propagation of Gravity without Time: Observational Evidences of Failure for the Speed of Gravity Based on the Earth Tide[J]. jgg, 2019, 39(7): 677-680.