1. Mass of the objects: The more massive the objects, the stronger the gravitational force between them. This is because gravity is directly proportional to the product of the masses.
2. Distance between the objects: The closer the objects are, the stronger the gravitational force between them. This is because gravity is inversely proportional to the square of the distance between the objects.
So, a more massive object will have a stronger gravitational pull than a less massive object, and two objects close together will have a stronger gravitational pull than two objects far apart.