Euclidean Relativity Solves the Hubble Constant Tension

Einsteins special relativity (SR) and general relativity (GR) describe nature in subjective concepts (concepts of observers), such as relative spacetime, wave, particle, and force. The word subjective does not imply that SR/GR would be limited to one point of view. It implies that, despite the Lorentz covariance of SR and the general covariance of GR, any point of view in SR/GR is egocentric. Even coordinate-free formulations of SR/GR or multiple egocentric perspectives do not provide a holistic view of nature (comprehensive view of nature from all possible perspectives at the same instant in time) because there is no absolute time in SR/GR. Here I show: Euclidean relativity (ER) describes nature in objective concepts (concepts that are immanent in all objects). Pure distance replaces spatial and temporal distance. Pure energy replaces wave and particle. Each objects proper space d1, d2, d3 and its proper time span an absolute 4D Euclidean spacetime (ES), where d1, d2, d3 and d4 = c are pure distances. All energy moves through ES at the speed of light c. An objects proper time flows in the direction of its 4D motion. Thus, there is a relative 4D vector flow of proper time. The invariant parameter is absolute, cosmic time t. An observers reality is created by projecting ES orthogonally to his proper space and to his proper time. ER neither competes with nor replaces SR/GR. ER complements SR/GR by adding a holistic view. SR/GR describe each observers reality. ER describes the master reality ES, which is beyond each observers reality. ER solves 15 fundamental mysteries geometrically, such as times arrow, the horizon problem, the Hubble constant tension, dark energy, the waveparticle duality, entanglement, and the baryon asymmetry.