Here's why:
* Newton's Law of Universal Gravitation: The force of gravity is directly proportional to the product of the masses of the two objects and inversely proportional to the square of the distance between them.
* Small Mass: Objects with very small mass exert very little gravitational pull.
* Large Distance: As the distance between objects increases, the gravitational force weakens rapidly (inverse square law).
Example: Two tiny grains of sand a mile apart would exert an incredibly small gravitational force on each other, practically impossible to detect.
In contrast, objects with very large masses (like planets or stars) have a much stronger gravitational pull, even at great distances.