Does anyone know that a cumulative jet is described by a formula that coincides with Kepler's third law, although slightly modernized (four parameters are reduced to three)? That is, under certain conditions (pressure, speed, etc.), the movement of any substance and ether ("emptiness", dark energy, dark matter) can be considered an incompressible fluid, described by a formula that is not widely known to most people, even those with higher education or a scientific degree: E=w²R³.