"Space, Time, and Spacetime"

"Space" refers to the three dimensions (length, width, height) where objects exist; "time" is the progression of events, allowing us to order moments. "Spacetime" combines these into a four-dimensional fabric, where space and time are interconnected. According to Einstein's theory of relativity, massive objects like stars and planets warp spacetime, affecting the movement of objects and the flow of time itself. This means gravity isn't just a force between objects but a curvature in spacetime that guides how objects move and how time passes in different regions.