The Curvature of Space Time

Our concept of a straight line is based on our resolution of how we view the world, which is about a meter at a time. And so we can see things that move in a straight line and we're like, that line's straight, but that's sort of like saying the earth is flat. No, no, no. The planets are moving in astraight line. But the curvature of space time is curved. This is similar to what's happening because massive objects distort space time and actually warp it in such a way that it creates this shape.