Yeah like the others said... Mars is not that far. Light years is really more about time than distance. How many earth years does it take to travel at the speed of light? 50 light years means it would take 50 earth years to get there traveling at the speed of light. Nobody knows if humans can even travel at the speed of light and afaik no technology exists to move matter that fast (though, some say light contains matter so I wouldn’t rule it out entirely).
I don’t believe the human body as it now exists, is made to survive that kind of travel for the needed periods of ‘time’. To move at necessary speeds, there are likely to be all kinds of steady, unrelenting pressures and temperature changes. A human would need to have an entire artificial environment built just to protect and maintain them. That’s a lot of heavy hardware.
Ben Rich “We already have the means to travel among the stars but these technologies are locked up in Black Projects…and it would take an act of God to ever get them out to benefit humanity. Anything you can imagine, we already know how to do.” “We now have the technology to take ET home. No, it won’t take someone’s lifetime to do it.
??