Either friendly physics is a new branch of natural science, which purposes are to give new impulses to the modern quantum mechanics, astrophysics, gravitation theories and other, on the basis of the now unjustly rejected ether hypothesis. The proposed ether hypothesis imagines the ether as a substance with properties of gas composed with an infinit number of minuscule particles (elons) much smaller than any other known particles. Such gas fills up all the space, including that between the celestial bodies and now known material particles: electrons, protons, nucleons etc., while exerting upon them the pressure of colossal amounts. The present book shows how the ether friendly physics can explain the cause of inertial and gravitational masses equality, as well as the nature of dark mass, Coulomb law, and such notions as mass, electric charge, and screening area.