Suppose a stationary observer was watching a space ship travel near the speed of light and close to a massive black hope so that time dilation from the relative velocity and gravity of the massive object are significant.(adsbygoogle = window.adsbygoogle || []).push({});

Assume that the ship is moving at 0.866c so that for every hour that passes for the ship's astronauts, 2 hours pass for the for the stationary observer perspecial relativity.

Now also assume, that the ship is close enough to the black hole so that for every hour that passes for the ship's astronauts, 2 hours pass for the for the stationary observer pergeneral relativity.

So the question is: what would be the combined effect?

P.S. I meant to post this in the Relativity Forum!

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# Combining Time Dilation from velocity and gravity

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