Living beyond possible

Q.) If i were to travel at 100,000 m/s in an exact horizontal line away from earth for approximately 1 year, when i return would everyone on earth have aged older than me? If so, and travelling 100,000 m/s is possible for a year constant, then could i not live for 100 *earth years* without aging even a fraction of what i should have?

tiny-tim
Homework Helper
welcome to pf!

hi lewis1440! welcome to pf!
If so, and travelling 100,000 m/s is possible for a year constant, then could i not live for 100 *earth years* without aging even a fraction of what i should have?

that's correct

but you'd need to go a lot faster: the time dilation factor is only √(1 - (v/c)2), so you'd need v/c to be very nearly 1

Q.) If i were to travel at 100,000 m/s in an exact horizontal line away from earth for approximately 1 year, when i return would everyone on earth have aged older than me? If so, and travelling 100,000 m/s is possible for a year constant, then could i not live for 100 *earth years* without aging even a fraction of what i should have?

Welcome! I'd add that, just in case you're not sure: your own experience would be "normal" from your perspective; it's only as you've very properly said: you age a particular way in relation to (in this case) earth.

I have to say, reading the title of this thread I was worried, but that's a good question.

ghwellsjr