Can Gravity Act Faster Than Light?

[arunshanker]

Instantaneous action of gravity
According to Albert Einstein's theory of special relativity, instantaneous action at a distance was seen to violate the relativistic upper limit on speed of propagation of information. For example if a massive object was removed will the effect be instantaneous or not
If so then meaning information had been transmitted faster than the speed of light. This violates the relativistic upper limit on speed of propagation of information
Speed of expansion of space is known to be faster that light
Is it possible that changes in the curvature of space also can be faster that light

 

[mfb]

For example if a massive object was removed will the effect be instantaneous or not

Probably not, but we do not know any way to remove objects from our world.

Speed of expansion of space is known to be faster that light

It depends on the coordinates you use. This is not a local speed, and it is not a speed of something in spacetime - it is not limited to anything.

Is it possible that changes in the curvature of space also can be faster that light

That is a completely different thing, and measurements did not find any FTL-propagation yet.

 

[mathman]

For example if a massive object was removed will the effect be instantaneous or not

Effect will occur at the same time object is seen to disappear (gravity moves at the speed of light).