**Time dilation causes gravity**

I've heard about how time dilation causes gravity (not the other way around) but what about the object is not moving, then why can time dilation affect it?

The truth in physics is simple and simplifying, but in the case of how gravity causes stuff to accelerate, it’s also stunning in describing the immense power at the root of gravity, and so requires a bit of introduction.

Consider:

Clocks run about 1/50th of a second slower *per year* on the surface of the Earth compared to clocks in deep space far from gravitational bodies.

That seems like such a tiny thing. But it’s not. In fact, that tiny bit of one tick of a clock is the cause of the acceleration of bodies in free fall and is the reason it takes so much power to send a rocket into orbit.