It is through full real human life actions that we sense the world. Our experience comes from the venture to involve ourselves in the universe. What we do are human realities in the energies functions of the universe. Our comprehension is the enterprise of human evolution continuing onwards in the universe.
In the ancient world human life on earth is used to comprehend the movements of planets and stars. In the renaissance planetary motions around the sun signify to Galileo a new science of the real truth of what is happening in nature. In the enlightenment Newton describes the movements of all bodies in the universe and discerns mass and acceleration as the physical realities of universal gravitation. It is energies interchanges of the whole universe coming together and concentrating through the mass function of stars rotating in galaxies that is the dynamic physical reality effect of the motions of masses we call gravity.
Observations of velocities of galaxies in the Coma cluster in the in the 1930s demonstrated that more matter that individual galaxy masses was needed to hold the cluster together. Vera Rubin in the 1970s observed that masses of individual stars was insufficient to explain how rotating galaxies kept from flying apart. The matter and mass coming together in galaxies clusters comes from energies concentrating through the universe. The energies coming together as matter and mass, that we call gravity, are functions of large scale interchanges of the whole universe.
Further observations of galaxies clusters and large scale structure of the universe in the 20th and 21st centuries continue to confirm that more matter is needed to account for the gravitational lensing of superclusters than combined galaxies masses. The energies of the universe that come together to make matter concentrate through the masses of stars and galaxies. These energies channel through the universe coming together as galaxies and we sense this concentrating of energy as matter. Energies of the whole universe come together concentrating through matter mass in dynamic interchanges we call gravity.
