3 ms·

http://www.wolframalpha.com/input/?i=time+dilation+traveling+at++.9999c+&a=*FS-_**RelativisticTimeDilationFormula.t-.*RelativisticTimeDilationFormula.to--&f2=40

http://www.wolframalpha.com/input/?i=time+dilation+traveling+at++.9999c+&a=*FS-_**RelativisticTimeDilationFormula.t-.*RelativisticTimeDilationFormula.to--&f2=40+years&x=7&y=11&f=RelativisticTimeDilationFormula.to_40+years http://www.wolframalpha.com/input/?i=time+dilation+traveling... 2828 years + 2200 = 5028 A.D. says wolfram alpha

palish 15y ago
Fascinating. 40 years at 0.90000c = 91.76 years 40 years at 0.99000c = 283.55 years 40 years at 0.99900c = 894.65 years 40 years at 0.99990c = 2828.00 years 40 years at 0.99999c = 8944.00 years
- Confusion 15y ago
  With the caveat that nobody will be traveling at 0.99999c for 40 years. You'd be really really far away by then.
  - splat 15y ago
    Well, you'd still be less than 10,000 light-years away. That's still well within the galaxy.