How far can you travel in comfort of gravity 1G in lifetime?

Question

Lets assume that humans live 80 years.

Answer 1

I'm wondering if you missed out part of your question.
How far can you travel at 1G if you life 80 years? We live our whole lives in a 1G environment.
How far you can travel depends on where you go and how fast you go.

Answer 2

Well, 1G is an acceleration. So, theoretically, accelerating at 32.2 ft/sec^2 from a stand still, according to wikipedia and dime dilation: "a constant 1 g acceleration would permit humans to travel as far as light has been able to since the big bang (some 13.7 billion light years) in one human lifetime."
Of course this gets into time travel, surpassing the speed of light and whatnot.

Answer 3

Well, you have to take into account special relativity - otherwise the answer would simply be d = 1/2 g t^2 where t is 80 years.

In fact, taking relativity into account after 25.3 years had elapsed on your space ship, 5 x 10^10 years will have passed on Earth and you will have reached a distance of around 5 x 10^10 light years (you will be almost at the speed of light accelerating that long) which is the edge of the known universe.

Answer 4

Assume you live to the ripe old age of 100 years. That's 3.156 x 10^7 seconds. 1g acceleration is 9.8 m/s^2. Distance = 1/2 acceleration x time^2
= 1/2 * 9.8 m/s^2 * (3.156 x 10^7s)^2
= 4.88 x 10^15 meters
Light travels 9.48 x 10^15 meters in one year, so you'd go about 1/2 a light year. Not enough to get to the nearest star outside out solar system.

Answer 5

I'd say until you're about 50, and then it starts getting pretty uncomfortable. :-)