Comment Re:Longer lifetimes is the answer (Score 1) 627
If we can accelerate at one g (internal reference) all the way (changing thrust direction halfway), we pretty quickly get close to light speed, which means that we can travel many light years in only a few years (internal time).
Of course there're several obstacles (power, collisions, etc.), but it would make it possible to travel great distances within one's lifetime even at below light speed.