What is it?
The gravitational constant (G) is a constant that we use in physics to calculate the strength of the gravitational pull between two objects. Its value is approximately 6.674×10−11 m3/kg⋅s2.
The units may seem strange, but it's just because of the variables involved in the equation. When you calculate the gravitational force between two entities using the formula below, the units cancel out to leave the unit we use to describe the effect of a force: its ability to accelerate objects (kg⋅m/s2).
Does the gravitational constant change?
The gravitational constant is a constant value i.e. it does not change. It will always be the same value.