The law of universal gravitation, formulated by Isaac Newton, applies to all objects with mass. It describes the attractive force between any two objects with mass, regardless of their size, shape, or composition. This means it applies to:

* Planets and stars: The gravitational pull between these massive objects is what keeps planets in orbit around stars.

* Moons and planets: The moon's orbit around Earth is a direct result of their gravitational attraction.

* Everyday objects: Even you and your phone are experiencing a minuscule gravitational force between you.

* Galaxies: Galaxies are held together by the gravitational attraction of the stars and other matter within them.

* Black holes: These incredibly dense objects have such strong gravity that even light cannot escape their pull.

Essentially, any two objects with mass will exert a gravitational force on each other. The strength of this force depends on:

* The mass of the objects: The more massive the objects, the stronger the gravitational force.

* The distance between the objects: The closer the objects, the stronger the gravitational force.

While it's often used to explain large-scale phenomena, the law of universal gravitation is a fundamental principle that applies to the entire universe.