Gravitation

Gravitation, also known as gravity, is a fundamental force of nature that causes objects with mass or energy to attract one another. It governs the motion of planets, stars, galaxies, and even light. Isaac Newton first formulated the law of universal gravitation, while Albert Einstein’s general relativity later described gravity as the curvature of spacetime. Gravitation is responsible for phenomena such as the orbits of celestial bodies, tides, and the structure of the universe. It is the weakest of the four fundamental forces but has an infinite range. Read more on Wikipedia