The definition of the force of gravity through acceleration. Say a mass is moving in a vectored motion in space between point A and point B with a constant velocity and acceleration at zero. The mass is a defined point. Say the object approaches a mass, such as a planet, in a way as to effect the vectored mass trajectory causing it path to bend. Defining this curvature is the clue to gravities definition. To determine the strength of gravity, I need to know certain facts. For one I need to know when the gravity effects the vectored mass. It is defined as the vectored mass has a constant velocity as it approaches any form of acceleration of velocity would define the outer limits of the gravitational field. Likewise, when the vectored mass, as it leaves the gravitational field, will again achieve a constant velocity and zero acceleration rate. Once these two points are defined and determined certain factors are also defined. This curvature distance defined by acceleration and velocity are two points that can be measured giving the curvature distance. Also and most important is to have measured the time of the distance traveled. To define acceleration and determine velocity. With the vectored mass defined by its weight, a known factor and distance traveled . Time has been measured for the vectored mass during its motion through the defined curvature. Newton’s second law states that Force= mass x acceleration. Mass is a given and acceleration has been measured at vector point a, initial gravitational field contact and vector point b, the release from the gravitational field, already defined. From this equation, we have a force applied, an initial and finishing velocity, and distance traveled of the defined vector mass. Mass x distance/ time elapsed between point A and B give the total overall effect of the gravitational field. I believe in order to measure the gravitational field strength, the very word field strength suggests gravity is not a vectored force. The gravitational field induces curvature suggesting that its definition should be standardized by the above defined conditions in order to give gravity a defined attractive field force. The total of distance traveled in a the specified measured time frame from initial and release points of the vectored mass in regards to gravitational field are now defined. An orbital mass such as a planet cannot define a gravitational field simply due to the fact that its acceleration is zero. If through experimentation of various vectored masses projected from outside the gravitational field strength, we could measure and determined to a higher degree of accuracy the gravitational field strength rather than simply measuring planetary bodies in relation to it center. The sun. Why? Simply because acceleration is zero among planetary bodies. This factor is important to determining gravitational field strength. As defined by Newton’s second law of motion. So the key to determining gravitational field strengths is the assumption that in order to define force, acceleration must occur. F=MA will always result in gravities force as equaling zero until we redefine the gravitational field as not a vectored force. It is an angular application of force causing curvature of objects of vectored motion. This is a suggestion of redefining the concept of motion as having a dual nature. John F. Henry 5/07/2009