Gravity

Gravity is a force that exists between any two objects that have mass. This force is proportional to the mass of the objects and decreases as the distance between them increases. In other words, the more massive an object is, the stronger its gravitational pull, and the closer two objects are, the stronger their gravitational attraction.

The theory of gravity was first introduced by Sir Isaac Newton, who observed that objects fall towards the Earth because of gravitational force. Newton’s law of universal gravitation states that every particle in the universe attracts every other particle with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.

Gravity has a significant impact on celestial bodies such as planets and stars. Planets revolve around the sun because of its gravitational pull, and the moon orbits around the Earth because of Earth’s gravity. Gravity is also responsible for stars staying together and rotating around the center of a galaxy.