Physics - Universe

Newton's 3rd Law
For every action there is an equal and opposite reaction.
Newton's third law, for every action there is an equal and opposite reaction. In other words, when one object exerts a force on another object, the second object exerts a force of equal strength in the opposite direction on the first object.

Newton's Law of universal Gravitation
Every object in the Universe atracts every other object with a force directed along the line of centers for the two objects that is proportional to the product of their masses and inversely proportional to the square of the separation between the two objects.