Yes, it is. At light speed, time dilation brings the high-speed observer to see the trip as instantaneous : http://en.wikipedia.org/wiki/File:Time_dilation.svg

Yes, it is. At light speed, time dilation brings the high-speed observer to see the trip as instantaneous : http://en.wikipedia.org/wiki/File:Time_dilation.svg http://en.wikipedia.org/wiki/File:Time_dilation.svg You can choose ANY time dilation factor and determine a velocity accordingly, because the graph is asymptotic and continuous. [EDIT: I mean, obviously, the whole thing breaks down with an observer actually AT light speed; assume above that I'm talking about taking limits of the Lorentz factor as velocity approaches 1]