Measurement of Earth motion effect to light propagation

Measurement of Earth motion effect to light propagation has been an essential issue in the modern physics for these 100 years. In 1881/1887, Mickelson (USA) and others measured the effect through the fringe pattern displacement. The results were “no effect”. This means "Light propagation time is not affected by the motion of observation system" and seems the premise of Lorentz’s “Length Contraction Hypothesis” (1892) or Einstein’s “Special Relativity Theory” (1905). Recently (2023), Ulrich Schreiber (Germany) and others precisely measured the Earth rotation with a Ring Laser Array, but only rotation. The goal of this report is to measure the Earth motion effect to light propagation and confirm the Michelson’s result in a different way. Because the no-weight laser beam is not affected by other’s motion, if the Earth moves, the beam spot looks moved. This sensitivity is about 10,000-times higher than the Michelson’s method. One-year observation revealed “Earth motion effect to light propagation exists and measurable”. The results show the Earth motion seems affected by two unknown motions and it is rapidly changing (10-100km/s) but far slower than the “Big-bang expansion speed (>300,000km/s?). This result imply our Galaxy seems made of two colliding galaxies. The Milky-way appearance of South-to-North long seems supporting this result.