The curvature of space-time refers to the way that the geometry of the universe is affected by the presence of matter and energy. According to the theory of general relativity, developed by Albert Einstein, the presence of mass or energy causes the fabric of space-time to curve, and objects moving through this curved space will follow a curved path. Think of it as if you were to place a heavy ball on a trampoline. The ball will cause the trampoline to dip and create a curved shape. Similarly, the presence of a massive object such as a planet or star will cause the fabric of space-time to curve, and objects moving nearby, such as a satellite, will follow a curved path as a result. The concept of the curvature of space-time is fundamental to our understanding of gravity and has been confirmed through numerous observations, including the precession of planetary orbits and the bending of light as it passes by massive objects.