How does gravity warp spacetime according to general relativity?

Spacetime is like a trampoline, when something heavy is on it, it bends, and things nearby move toward it.

Imagine you have a big trampoline, nice and flat. If you put a heavy ball in the middle, the trampoline sags around it. Now, if you roll a smaller ball near the heavy one, it will curve toward it, not because of magic, but because the trampoline is bent.

In general relativity, spacetime is like that trampoline. When something really big and heavy, like a planet or a star, is in spacetime, it warps it, just like the heavy ball made the trampoline sag. Other things nearby, like people or satellites, follow the curve of this warped spacetime, which makes them move toward the heavy object.

Gravity is the Curve

Think about walking on a curved surface: you might not feel the curve, but your path changes because of it. That’s how gravity works, not as something pulling you from above, but as a curve in the fabric of spacetime that guides your motion. It's like rolling down a hill, you're just following the shape of the world around you! Spacetime is like a trampoline, when something heavy is on it, it bends, and things nearby move toward it.

Imagine you have a big trampoline, nice and flat. If you put a heavy ball in the middle, the trampoline sags around it. Now, if you roll a smaller ball near the heavy one, it will curve toward it, not because of magic, but because the trampoline is bent.

In general relativity, spacetime is like that trampoline. When something really big and heavy, like a planet or a star, is in spacetime, it warps it, just like the heavy ball made the trampoline sag. Other things nearby, like people or satellites, follow the curve of this warped spacetime, which makes them move toward the heavy object.

Take the quiz →

Examples

  1. Imagine a trampoline: when you put a heavy ball on it, the surface bends around it, like how gravity warps spacetime.
  2. A person standing near a massive object feels time passing more slowly than someone far away.
  3. Light from a star bends as it passes by a massive object, like the Sun.

Ask a question

See also

Discussion

Recent activity