Is Gravity Instantaneous?

At what speed does the effect of gravity travel. If it is instantaneous (effects are immediate at all distances), how is that possible?
- Salomon (age 59)
Hickory, NC USA

You're right that instant gravity would be a problem. It would allow signals to travel faster than light, which creates big paradoxes for relativity.

As we've discussed before, gravitational changes travel at the speed of light.

Mike W.

(published on 11/26/2015)