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rooskie72 OP t1_iwp3nim wrote

Reply to comment by Barcata in can anyone explain to me how time would work if your going the speed of light or increasingly getting there? by rooskie72

So in retrospect.. Time travel into the future?

Anyways, Would you feel the difference at all? Say you spend the 3 or so day to go to the ISS. Then turn back around and take another 3 days. Six days total in space. When you get back it's been six days to you. It's been twelve days to everyone else.

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Barcata t1_iwp4ihy wrote

Not twelve days, but slightly longer than six. But yes, time travel into the future; however we are already doing that at the rate of one second per second. The faster you go, the more that rate increases. Moving to the ISS in three days does not get you anywhere near the speed of light, so this effect is negligible and I'd argue that general relativity time dilation would be a greater effect.

Gamma is 1/sqrt(1-(v^2 /c^2 )) so unless you are travelling near the speed of light, special relativity is extremely minor. If your velocity was great enough for gamma to equal 2, you would experience half the time as a stationary observer would. It's all weird stuff.

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rooskie72 OP t1_iwp6n32 wrote

Definitely got me now lol. I guess I was just tossing examples of times more so then knowing.

So how do people achieve getting close to the spped of light? I know how an engine runs. Fuel, spark, and air. But does that go the same for rockets?

Last question for now lol, so from what I gather is person 1 (going the speed of light) and person 2 (sitting at home) P2 would have a longer time then P1 would technically have even though it's technically the same time plane?

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Barcata t1_iwpatw9 wrote

>So how do people achieve getting close to the spped of light?

We don't. The amount of energy required to accelerate a mass is proportional to gamma, as the relativistic mass increases.

>technically the same time plane?

This is a nonsensical statement.

Keep reading, and stay away from youtube. Einstein's book is readily available. I'll buy it for you if you DM me and you cannot afford it.

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BrotherBrutha t1_iwpkcah wrote

>So in retrospect.. Time travel into the future?

Yep, astronauts do it all the time, although not by very much, obviously!

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