I just want to make sure I understand this clearly. Light travels at 186 000 miles/second right? So if something was 10 light years away would that mean that it would take 10 years going at the speed of light to get there? Wouldnt it be possible to make a probe go even half that speed? I dont know how fast voyager is going but would it be possible we we just strap on a plasma rocket ( a really big one) and let it build up speed. Is that a dumb question?