Image: Roundtriptimes

Description: This plot illustrates how a spaceship capable of 1 g acceleration for 100 years can power a round trip to most anywhere in the visible universe, and back in a lifetime or less. Additional time will have elapsed on earth by the time that you return. This advantage of constant proper acceleration in a relativistic world arises because proper velocity change is proportional to acceleration times the change in map rather than traveler time. As those two begin to differ, the advantage (over the dotted straight line above) emerges. Of course, building a spaceship that can do this is another story.
Title: Roundtriptimes
Credit: Own work
Author: P. Fraundorf
Usage Terms: GNU Free Documentation License
License: GFDL
License Link: http://www.gnu.org/copyleft/fdl.html
Attribution Required?: Yes