Spacetime

Spacetime is the four-dimensional fabric that combines the three dimensions of space with the dimension of time. Instead of thinking of space and time as separate, spacetime views them as interconnected. Events occur at specific locations in space and at particular moments in time, forming a continuum. This concept, introduced by Albert Einstein in his theory of relativity, helps explain how gravity works: massive objects like planets and stars curve spacetime around them, influencing the motion of other objects. Thus, spacetime is essential for understanding the universe's structure and the behavior of objects within it.