Help me understand Special Relativity. Can one actually use its effects in a relativistic-speeds spaceship to 'expand the crews lifetime'. As in, getting to distant star in months or even almost instantly (when fast enough), from the perspective of the crew of course, not Earth or the destination.

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Anonymous Thu Dec 7 15:10:00 2017 No.9350003 [Reply] [Original]

Help me understand Special Relativity.
Can one actually use its effects in a relativistic-speeds spaceship to 'expand the crews lifetime'.
As in, getting to distant star in months or even almost instantly (when fast enough), from the perspective of the crew of course, not Earth or the destination.

Anonymous Fri Dec 8 00:28:17 2017 No.9351136

>>9350003
You could "expand the crews lifetime" to almost infinite lengths, but they wouldn't live it. Imagine a train going in a straight line at speeds so fast that special relativity is relevant. If someone at the back of a car gets up and sprints to the front, he would almost freeze in place. To him, it took a couple seconds to run twenty feet. To everyone else in the train, that guy stood there for twenty years, slowly inching along until he reached the end and returned to normal time.

As for the "getting to a distant star in months from the perspective of the crew", yeah, pretty much.

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