# Square-Cube Law?

I've heard about something called the square-cube law. What is it? All I know of it is that it has something to do with mass of large objects and their gravitational influence.

You are probably referring to Kepler's third law, which states that the square of the period of orbit of a planet is proportional to the cube of the semi-major axis of its orbit. It can be mathematically expressed as $$\frac{T_1^2}{R_1^3}\approx\frac{T_2^2}{R_2^3}$$ for planets $1$ and $2$ in the solar system. This equality is exact in the limit where the mass of the Sun goes to infinity.