Here's why:
* 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 = 4). If you triple the distance, the force becomes nine times weaker (3 squared = 9).
In summary:
* Closer objects: Stronger gravitational force.
* Farther objects: Weaker gravitational force.
This is why we feel the Earth's gravity strongly on its surface, but much less strongly when we are in space far from Earth.