Newton's Law of Universal Gravitation states that every massive particle in the universe attracts every other massive particle with a force which is directly proportional to the product of their...
It is universal because Newton's law of universal gravitation is a law of nature, which means anywhere in the universe the same law of gravity would apply. Universal means it's the same equation...
Newton's Law of Universal Gravitation is the foundation of modern science. This law gave birth to the idea that there are universal laws and provided a mathematical framework for the scientific laws.