In Kip Thorne's book "Timewarps" he describes a hypothetical spaceship decelerating almost to the event horizon of a supermassive blackhole, and says that the manoevre takes 13 years. I assume that the motion is along a geodesic.(adsbygoogle = window.adsbygoogle || []).push({});

In terms of the Schwarzschild metric, how would this motion be described and how would the elapsed time be calculated?

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# Decelerating at 1g into a black hole

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