The intensity of an effect from a localized source spreads uniformly throughout the surrounding space and weakens with the inverse square of the distance.
the force that an object exerts on a supporting surface (or, if suspended, on a supporting string), which is often, but not always, due to the force of gravity.
having little or no weight or apparent gravitational pull
Law of universal gravitation
Every body in the universe attracts every other body with a force that, for two bodies, is directly proportional to the product of their masses and inversely proportional to the square of the distance separating them.
Any object that moves through the air or space under the influence of gravity
The curved path followed by a projectile under the influence of constant gravity only.
A projectile or small celestial body that orbits a larger celestial body.
The oval path followed by a satellite
The speed that a projectile, space probe, or similar object must reach to escape the gravitational influence of Earth or of another celestial body to which it is attracted.