The space that exists between the stars and planets of our universe is not mere emptiness. It is more like a fabric, which we call spacetime, that ties all the heavenly bodies together. Planets and stars displace this fabric, warping spacetime with their mass, like a bowling ball sinking into the elastic of a trampoline; they create spatial indentations in three dimensions. We experience gravity because we are basically falling through the indentation made by the Earth, but the ground beneath our feet prevents us from falling even farther.

But what is spacetime, really? It has no substance, no atomic or molecular structure. No, it is composed of something much smaller: tiny vibrating strings that exist on a scale much smaller than atoms. All of the forces of the universe are communicated through the various harmonic resonances of these strings.

String harmonics control forces such as gravity and, as Einstein noted, gravity and motion are essentially identical. A change in your motion will bring about a change in your perception of gravity. Conversely, a change in gravity, would bring about a change in your motion.