Talk:Newton's law of universal gravitation

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A fact from this article was featured on Wikipedia's Main Page in the On this day section on July 5, 2008.

"Observations conflicting with Newton's theory"[edit]

I don't get the meaning and purpose of the last sentence in the last paragraph - in the section "Observations conflicting with Newton's theory" - can anyone edit it to clarify the meaning?

"The problem is that Newton's Theories and his mathematical formulas explain and permit the (inaccurate) calculation of the effects of the precession of the perihelions of the orbits and the deflection of light rays. However, they did not and do not explain the equivalence of the behavior of various masses under the influence of gravity, independent of the quantities of matter involved."

G is the probabilistic effect of overall attraction[edit]

F = G \frac{m_1 m_2}{r^2}\ , where:

F is the force between the masses, G is the gravitational constant (6.673×10−11 N·(m/kg)2), m1 is the first mass, m2 is the second mass, and r is the distance between the centers of the masses. Diagram of two masses attracting one another