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phyzguy
phyzguy is offline
#2
Feb19-12, 07:06 AM
P: 2,068
It would take 10 minutes for us to feel the pull. Changes in gravity propagate at the speed of light. The easiest way to see this is by linearizing Einstein's equations of general relativity, so that the metric is a flat metric plus a small perturbation. Then it's easy to show that such perturbations travel at the speed of light and are called gravitational waves.