Things will change so much in the next few hundred years.  If there is some way to power a spaceship with fusion and accelerate to close to light speed we could travel to other solar systems.  Could be a while... accelerating at 1g (like going 0-100 in a super fast car) but contributing at this rate of acceleration it would take a year to reach the speed of light. This acceleration would create a perfect environment weight for our bodies to stay healthy.  Just need to somehow create fusion and a way to steadily release the energy.  Time to start the work