[AlexanderTheGr8]

Human hibernation should be able to solve that problem. I know I am asking for too many things but the challenges for the Apollo mission were even more extravagant.

They had to figure out how to launch from earth's gravity, go exactly to the moon, decelerate, land without accident, launch back again, go exactly to the earth, decelerate and land without accident. Atmospheric reentry is almost 25000 degree Celsius, hotter than almost anything we had ever experienced.

So, given a century, surely medicine will figure out hibernation. And then humans can continue their lifespan when they reach their destination.