* Mass of the objects: The more massive the objects, the stronger the gravitational force between them. This is a direct relationship – double the mass, double the force.
* Distance between the objects: The closer the objects are, the stronger the gravitational force. This is an inverse square relationship – double the distance, the force becomes four times weaker.
These factors are captured in Newton's Law of Universal Gravitation:
```
F = G * (m1 * m2) / r^2
```
Where:
* F is the force of gravity
* G is the gravitational constant (approximately 6.674 × 10^-11 m^3 kg^-1 s^-2)
* m1 and m2 are the masses of the two objects
* r is the distance between the centers of the two objects
So, the greater the mass and the smaller the distance, the stronger the gravitational force.
