The General Theory of Relativity (book)

*The General Theory of Relativity*, formulated by Albert Einstein, describes gravity not as a force but as the curvature of spacetime caused by mass and energy. Massive objects like stars and planets create dents in the fabric of space and time, guiding the motion of objects and light nearby. This theory explains phenomena such as the orbit of planets, black holes, and gravitational waves, reshaping our understanding of gravity's nature and the universe’s structure. It remains a fundamental framework for modern physics, merging space, time, and gravity into a unified description.