**7. Nature of gravity**

Earlier work [7] discussed the uniqueness of gravity that is distinct from electric or magnetic fields and from light. Gravity emanates from all objects with mass. Important characteristics of gravity are what it is not. Gravity is not energy, does not require loss of mass or loss of energy to exist around an object [8], is not a wave or a force, and is not spatially reducible. Gravity is an accelerating region in which masses produce a force. Gravity is not diffracted or reflected like light and is not attenuated or diminished by objects in its presence like electric fields are. Even a miniscule electron has gravity emanating around it because electrons have mass. Two neutrons separated by distance **r** have a gravitational force between them of **F** = Gm2 /**r** 2 where m is the mass of a neutron and G is the universal gravitation constant. There is no region in space around one neutron where the other neutron is able to escape the gravitation from the other. This is found by experiment and indicates that gravity should not be considered a force field characterized with field lines since this could imply that at some distance **r** from the mass that there could be a spatial position at that distance where that gravity might be absent.

Gravity intensity at a given distance from a mass is spatially irreducible. This is because even a miniscule electron senses its presence at any position at which it is located at a distance **r**. Pluto is a huge 6 billion km from the sun and nevertheless is smoothly turned by gravity at every position in its orbit, not only preventing its escape into space but also causing the tracing of an orbit that follows an elliptic mathematical function. Gravity is not reducible at any spatial position along the orbit. All planets in the solar system fall endlessly in perpetuity along elliptic paths in a dynamic equilibrium that is always striving to increase entropy while minimizing orbital energy [9]. Orbiting bodies around the sun instantly detect changes in gravity from the wobbling travel pattern of the sun even at great distances, which causes the bodies to change speed to travel in a smooth elliptic orbit. Galaxies in the universe may also behave in such a way, where each are gravitationally attracted to maintain order in the universe of matter where rotating galaxies maintain relative positions possibly in a dynamic equilibrium steady state.
