Originally Posted by kamikhaan
Remember that gravity is acceleration. Travelling at 99% of the speed of light inflicts 0 G upon you since the ship does not accelerate.
The average surface gravity on Earth is 9.81 m/s² , so if the space ship had a constant acceleration of 9.81 m/s² the crew would at all times experience ~1 G. With this constant accelertaion however, you'd theoretically reach the speed of light within 354 days or so, so before you reached c, you'd need a constant deacceleration of 9.81 m/s² also in order to keep the gravity it constant. All this would of course require insane amounts of energy.
Spoiler Alert, click show to read:
I think both high speeds and high acceleration causes watches to go slower.Originally Posted by Kralizec
Edit: At least high speed does http://en.wikipedia.org/wiki/Time_Di...d_space_flight
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