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I'm new to GR and trying to understand everything in general now...

I was looking at pictures like this one

http://upload.wikimedia.org/wikipedia/commons/2/22/Spacetime_curvature.png

for a very long time. I made two major "experimental" conclusions here:

1. A meter near planet will be longer that a meter far a way from it for observer outside the planet;

2. If two objects travel parallel with same speed and one of them goes near planet, then the one that is closer to the planet will remain behind (if we neglect its trajectory change), but when they come out of the gravity influence, they will have same speed again.

Is that correct?

But I still can't understand, where gravity

*force*comes in action at this picture? I read from Hawking that gravity is curvature. I can only understand it if I add in mind some additional force on the picture directed down that will hold a moving object on this curve - but isn't is stupid?

And where the graviton comes in action here?