Central Force - A force directed at the center of motion of a body. Gravity is the central force that accounts for the orbital motion of solar system bodies ...
Of a central force filed, as of a planet; to overcome by gravitational force the velocity of a passing body and bring the body under the control of the central force field, in some cases absorbing its mass.
2.
antigravity (NASA Thesaurus / NASA SP-7, 1965) A hypothetical effect that would arise from cancellation by some energy field of the effect of the central force field of the earth or other body.
Until the 1910s Sir Isaac Newton's law of universal gravitation, two particles attract each other with a central force proportional to the product of their masses and inversely proportional to the square of the distance between them, ...
Orbital Motion: motion of a particle with a /r2 central force applied. In intro physics the topic was the motion of planets under the influence of the Sun's gravitational force...orbital mechanics.
The outer layers of the star could no longer resist the central force of gravity, which was pulling the star's outer matter inward toward its core. What happened next depended on the mass of the star.
For a given central force, increasing the velocity causes the orbit to change from a circle to an ellipse to a parabola to a hyperbola, with the changes occurring at certain critical velocities.
 See also: Orbit, Earth, Sun, Gravitation, Force
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