Curvature of Space-Time

Curvature of space-time is an idea from Einstein's theory of general relativity, describing how gravity works. Instead of viewing gravity as a force between objects, it explains that mass and energy bend the fabric of space and time, much like a heavy ball creates a dip on a stretched rubber sheet. This curvature influences how objects move—those nearby follow curved paths called geodesics. So, planets orbit stars and light bends around massive objects because space-time itself is curved, guiding their paths. It's a fundamental way to understand gravity not as a force but as the geometry of the universe.