On the afternoon of December 26, a press conference on "Observation Evidence of the Gravitational Field Propagating at the Speed ​​of Light" was held in Beijing. Chinese scientists announced at the press conference that they obtained "the first observational evidence that the gravitational field travels at the speed of light." The scientific team led by Researcher Tang Keyun, Institute of Geology and Geophysics, Chinese Academy of Sciences, and personnel from the China Earthquake Administration and the University of Chinese Academy of Sciences, after more than ten years of continuous exploration, after carrying out multiple solid tide observations during the eclipse, It is found that the current formula of the earth's solid tide actually implies the assumption that the gravitational field propagates at the speed of light, so a method for measuring the gravitational propagation velocity with the solid tide is proposed. "Observational evidences for the speed of the gravity based on the Earth tide" reports the results of using high-quality earth solid tide data from Tibet and Xinjiang to measure the speed of gravitational propagation. In recent years, Researcher Tang Keyun and his team at the Institute of Geology and Geophysics, Chinese Academy of Sciences have implemented the 1997 Mohe Total Solar Eclipse Observation, 2001 Zambia Total Solar Eclipse Observation, 2002 Australia Total Solar Eclipse Observation, 2008 Jiayuguan Total Solar Eclipse Observation, 2009 The Shanghai-Hangzhou-Huzhou total solar eclipse observation and the 2010 Dali solar eclipse observation in Yunnan are mainly gravity solid tide observations. After several "gravitational observations during a total solar eclipse", the group found that "the assumption of the current solid tide theory formula implies that the gravitational field propagates at the speed of light", and then derived the gravitational propagation velocity equation and found a solution to the gravitational field An effective method of velocity; after selecting the solid tide data from the Shiquanhe Station in Tibet and the Ushi Station in Xinjiang far away from the Pacific, Atlantic, Indian and Arctic oceans for viscoelastic lag correction, it is substituted into the gravitational propagation velocity equation to obtain the The first observational evidence ". Over the years, this research has been supported by the Ministry of Science and Technology, the National Fund Committee, the Chinese Academy of Sciences, and the China Earthquake Administration respectively. This original innovation is of great significance to the theoretical and experimental research of the gravitational field.
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