Authors: Hyoyoung Choi
After the expansion of universe was observed in the 1920s, physicists and astronomers introduced the concept of ”space expands" into physics and many observations and research results were used based on this. However, we can’t explain why space expands and why it has a specific velocity and is no observations of expansion of space. This study proves that the expansion of the universe and Hubble’s law doesn't result from the expansion of space, but is a dynamical result from the movement of galaxies in space. We could confirm that Hubble’s law was always valid when the effect of acceleration was smaller than initial velocity. We can define the center of the universe and find it. There is a possibility that 2.7K background radiation is not radiation in the early days of the universe. In that case, we can't estimate that our universe is isotropic and uniform from CMBR. Also, this shows that cosmological red shift comes out from the Doppler effect of light. Expansion of space was explained that it was related to red shift and scale factor. Therefore, it is influencing many areas of astronomy and cosmology. Therefore, if this discovery is true, all matters related to red shift and scale factor should be reviewed
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