Spacetime Manifold

A spacetime manifold is a mathematical concept used in physics to describe the universe. It combines three dimensions of space (length, width, height) with time into a single four-dimensional framework. This allows us to understand how objects and events are positioned and interact within the universe. In this model, gravity is not just a force but a curvature of this spacetime caused by mass. Thus, massive objects like planets and stars influence the shape of spacetime around them, affecting how other objects move, illustrating Einstein's theory of general relativity.