Am 25.08.2015 um 08:08 schrieb clipka:

> That certainly depends on whether you look at it from the perspective of
> an outside observer (who will notice your acceleration decreasing, which
> to him is actually the reason why you'll never seem to reach the speed
> of light), or that of the traveler. To the latter, his mass remains
> constant, and acceleration at a constant 1g is perfectly possible.

This, BTW, follows directly from the most fundamental principle of
General Relativity: As long as you don't look out the window, you can't
tell whether you're accelerating, or are stationary in a gravitational
field excerting an equivalent force. In the latter case, your mass
obviously does not increase over time; therefore, neither does it in the
former case.

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