^Well the 3 years might be at a certain speed. After all a car uses it's fuel more efficently at certain speeds. As for fuel that's what the Busssard collectors to allow partial refuelling to take place whilst moving through space.
But for sure at times they just wrote what sound good. 4 billin miles per second sounds really fast, it's not until you actually work it out thats 21 000 times the light that you run into a problem. I.e at those speeds it would take Voyager about 40 months to return home
But for sure at times they just wrote what sound good. 4 billin miles per second sounds really fast, it's not until you actually work it out thats 21 000 times the light that you run into a problem. I.e at those speeds it would take Voyager about 40 months to return home