* Newton's Law of Universal Gravitation: This law states that the force of gravity between two objects is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.
* Inverse Square Law: The "inverse square" part is crucial. It means that if you double the distance between the objects, the gravitational force between them becomes four times weaker (2 squared). If you triple the distance, the force becomes nine times weaker (3 squared).
In simpler terms: Imagine you have two magnets. When they are close together, they attract strongly. As you move them further apart, the attraction gets weaker and weaker until it's almost unnoticeable. Gravity behaves similarly.
Example: The Earth's gravity pulls you towards its center. You feel this force as your weight. If you were to travel far away from Earth into space, the Earth's gravity would become weaker, and you would feel lighter.