There has been a lot of discussion of late about "Dark Matter". However, the Space Vortex Theory (SVT) has a different perspective on dark matter.
The sketch below shows the Earth enclosed within a vacuum vortex. Unlike the ongoing concepts of vacuum to be “empty space”, “nothing-ness” and “Void-ness”, the Space Vortex Theory (SVT) defines the absolute vacuum to be a mass-less, continuous and incompressible fluid.
The velocity fields in the underneath substratum (shown through directional arrows) create invisible forces to rotate the massive Earth around its axis and also carry the Moon in its orbit.
While the Earth is visible, the vacuum vortex substratum is invisible. This invisible substratum of cosmic energy, underneath and around the Earth, is mistakenly called “dark matter”. All planets and stars have similar vacuum vortices that rotate them axially. The vortices enclosing the galaxies impart axial rotation to their cores, as also the stars in them are carried in orbits. [Rene Descartes, the French mathematician and philosopher, predicted an Earth vortex and cosmic vortices of property-less fluid (Ether) in the 17th Century].