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. As the distance between objects increases, the force of gravity weakens very quickly.
* Practical Implications: At very large distances, the force of gravity becomes so weak that it's essentially negligible. For example, the gravitational pull between you and a distant star is incredibly small.
In summary: While all objects with mass exert a gravitational pull on each other, the force is so weak at large distances that it's practically non-existent.