Answer:
Newtons law of gravitation is called the universal law of gravitation because it is applicable for all masses at all distances, independent of the medium.
Step-by-step explanation:
![\sf{}](https://img.qammunity.org/2022/formulas/physics/college/1ps4sdr42yzht4v8cjxmd0le78ht9sda8y.png)
For two masses m1 and m2 placed at a distance d, the gravitational force between them will always be given by: Fg=Gd2m1m2. That's why it is a "universal" law.