Here's a breakdown:

* Newton's Law of Universal Gravitation: This law states that every particle in the Universe attracts every other particle with a force that is:

* Proportional to the product of their masses: The more massive the objects, the stronger the gravitational force.

* Inversely proportional to the square of the distance between their centers: The farther apart the objects, the weaker the gravitational force.

This law explains why objects fall to the Earth, why the Earth orbits the Sun, and why the Moon orbits the Earth.

Important Note: While Newton's Law of Universal Gravitation provides a very accurate description of gravity for most everyday situations, it doesn't fully explain certain phenomena, like the behavior of gravity in extreme conditions (near very massive objects or at very small scales). Einstein's Theory of General Relativity provides a more complete understanding of gravity, but it's more complex and is usually only needed for situations involving very strong gravitational fields.