Newton's law of gravitation says that the force due to gravitation between two objects with masses m₁ and m₁ is given by the formula
[tex]F=G\dfrac{m_1m_2}{r^2}[/tex]
Where r is the distance between the objects, and G is the gravitational constant (about 6.674×10⁻¹¹ m³⋅kg⁻¹⋅s⁻²)