/sci/ - Science & Math

>>15183716
>Spacetime doesn't move
What's the difference between spacetime curving and spacetime moving? Or am I thinking about this wrong.

I mean somehow the information about matter/energy/whatever has to be communicated to the spacetime manifold thingamabob so it knows how to curve right? That information should travel at the speed of light?

I'm imagining spacetime like a body of water, and matter moving in spacetime is like a drop of water falling on to it. And the wave traveling through the water in response to the drop is like spacetime curving in response to the matter. That wave has a certain speed associated with it, shouldn't space time itself have a certain speed or something associated with it? Is that basically what gravitational waves are? But gravitational waves aren't space time. Just like the body of water isn't the wave itself...

I don't know, I barely started reading about GR just trying to get a reasonable intuition before going into details.