So how fast and how long for significant forward time travel?
toddstauffer
11

Time dilation’s effect really becomes useful enough after you start counting decimal nines. Also worth mentioning that the closest you are already to the speed of light, the more energy you need to keep accelerating at the same rate.

                           Rest Frame Time Elapsed
per Day on Ship
v/c Days Years

0.0 1.00 0.003
0.1 1.01 0.003
0.2 1.02 0.003
0.3 1.05 0.003
0.4 1.09 0.003
0.5 1.15 0.003
0.6 1.25 0.003
0.7 1.40 0.004
0.8 1.67 0.005
0.9 2.29 0.006
0.95 3.20 0.009
0.97 4.11 0.011
0.99 7.09 0.019
0.995 10.01 0.027
0.999 22.37 0.061
0.9999 70.71 0.194
0.99999 223.61 0.613
0.999999 707.11 1.937
0.9999999 2236.07 6.126
0.99999999 7071.07 19.373
0.999999999 22360.68 61.262
0.9999999999 70710.68 193.728
0.99999999999 223606.79 612.621
0.999999999999 707114.60 1937.300
0.9999999999999 2235720.41 6125.261
0.99999999999999 7073895.38 19380.535
0.999999999999999 22369621.33 61286.634

https://www.fourmilab.ch/cship/timedial.html

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