# Thread: Whats the time dilation of objects travelling at (99.999rec%)c?

1. Whats the time dilation of objects travelling at (99.999rec%)c?

According to wiki,
after 6 months on the ISS, the astronaut crew has indeed aged less than those on Earth, but only by about 0.007 seconds
263520.000seconds passed on earth, and 263520.007seconds passed on the ISS.
which makes the time passing in the ISS 0.000002656% slower.
However, the ISS is travelling only a split of a tiny fraction of the speed of light. so the time slowing is little, at 0.000002656%.

Just supposedly, the ISS is travelling at 99.999rec% at the speed of light compared to earth.
What is the % slower time passes compared to earth?

2.

3. Hi ryanawe123

I think this should be easy to deduce. Since you are using the same object, and only require a percentage outcome, I think that simple comparasons will suffice. So...

percentage/time = percentage/time

But at that percentage of the speed of light, time would almost stand still for the affected person/s

4. Please mind my spelling. I'm not so good with the english language.

5. Originally Posted by ryanawe123
Whats the time dilation of objects travelling at (99.999rec%)c?

According to wiki,
after 6 months on the ISS, the astronaut crew has indeed aged less than those on Earth, but only by about 0.007 seconds
263520.000seconds passed on earth, and 263520.007seconds passed on the ISS.
which makes the time passing in the ISS 0.000002656% slower.
However, the ISS is travelling only a split of a tiny fraction of the speed of light. so the time slowing is little, at 0.000002656%.

Just supposedly, the ISS is travelling at 99.999rec% at the speed of light compared to earth.
What is the % slower time passes compared to earth?
For time dilation due to velocity, the equation is:

But in the case of the ISS, the difference in gravity is probably a more significant factor. But this requires much more complicated math to work out...

6. Originally Posted by ryanawe123
Whats the time dilation of objects travelling at (99.999rec%)c?
99.999rec% of c? Recurring? As in 0.999...c ?

This is an impossible speed, for as 0.999.... = 1 then 0.999...c = c.

So you are asking what the time dilation is for objects travelling at the speed of light.

7. Originally Posted by SpeedFreek
99.999rec% of c? Recurring? As in 0.999...c ?
Didn't spot that!

This is an impossible speed, for as 0.999.... = 1
Noooooo! Don't start that thread here...

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