The force that causes objects to move toward each other is known as gravity. It is a fundamental force of nature that attracts two bodies with mass, influenced by their mass and the distance between them. Newton's law of universal gravitation quantifies this interaction, stating that the gravitational force is proportional to the product of their masses and inversely proportional to the square of the distance separating them. Gravity is responsible for keeping planets in their orbits, shaping the structure of the universe, and governing many physical phenomena on Earth.