1. Mass of the objects: The more massive the objects are, the stronger the gravitational force between them. This is because gravity is a force of attraction between any two objects with mass.
2. Distance between the objects: The closer the objects are to each other, the stronger the gravitational force. This is because the force of gravity weakens with distance. This relationship is inverse-square, meaning that if you double the distance between two objects, the gravitational force between them will decrease by a factor of four.
You can summarize this with the following formula:
* F = G * (m1 * m2) / r^2
Where:
* F = the force of gravity
* G = the gravitational constant
* m1 = mass of object 1
* m2 = mass of object 2
* r = the distance between the centers of the objects
