Kütleçekim

Kütleçekim, also known as gravity, is a fundamental force of nature that attracts any two objects with mass or energy. It is responsible for keeping planets in orbit around stars, stars in galaxies, and galaxies in clusters. The strength of the gravitational force between two objects depends on their masses and the distance between them. The more massive the objects, the stronger the gravitational pull. Conversely, the farther apart the objects are, the weaker the gravitational pull.

Newton's law of universal gravitation, formulated by Isaac Newton, describes this force as being proportional to the product of the two masses and inversely proportional to the square of the distance between their centers. This law accurately describes many gravitational phenomena observed in the universe, from the falling of an apple to the motion of the Moon.

Albert Einstein's theory of general relativity, however, provides a more comprehensive understanding of gravity. General relativity describes gravity not as a force, but as a curvature of spacetime caused by the presence of mass and energy. Massive objects warp the fabric of spacetime around them, and other objects follow these curves, which we perceive as the force of gravity. This theory has been experimentally verified and explains phenomena that Newton's law cannot, such as the bending of light by massive objects and the existence of gravitational waves. Kütleçekim is a pervasive and essential force that shapes the structure and evolution of the cosmos.