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.
Oh indeed. When cars were invented there were people who said it is impossible for man to go faster than riding a horse. I like to think of it like an airplane. Once inside, you can travel at many times the speed of sound without noticing it because you are traveling at the same speed as the craft. So theoretically it is not impossible to build an environment that could travel at the speed of light. Technologically speaking, I’d say near impossible but could not rule it out entirely assuming the human race lives long enough to develop it. Not, imo, in anyone who is currently living to find out. Maybe in 3000 years someone will read this thread via mind meld - but then it wouldn’t matter if they did :-)
Frankly I’d say it is more realistic to think that we humans could someday copy and paste ourselves into a computer, at which point we could travel the universe indefinitely, and colonize other galaxies as some form of AI/Bot. After which, the primates would take over and evolve. Though that’s my wife’s obsession with Ancient Aliens rubbing off on me.
Moreover, at 50 light years, the person in the craft would age 50 years to get there. That’s basically an entire adult lifetime inside an artificial spacecraft. You’d have to make the environment such that 2nd and 3rd generations would be the ones who land on the planet. From a moral perspective, that’s tantamount to slavery. The persons born on the craft would be, without free will, indentured servants of those who planned the mission.
Not to mention, there is no turning back. One light year is almost 700,000 earth years. Just travel for a fraction of the time, when you return to earth everyone you knew will be dust. So may the planet.