Was reading a thread earlier today about cell regeneration and being able to grow new organs for individuals outside of their bodies, which won't reject them. Such technology, combined with better propulsion systems could be our key to deep space travel. Just thinking out loud. ;p
Well then think about this. While I am a admirer of space travel and wish we could make the journey to other galaxies, or even other solar systems within our galaxay, there is one problem that seems to difficult to over come. That is water. It would be possible to grow food, sending married couples who could reproduce would solve the long time problem, but in order to grow food and for couples to survive long enough to have children they need water.
It is impossible at this time to carry enough water to make a very long journey to other planets.
Mars would be about our limit and then we would be limited to how long we could stay, unless water Ice is found on Mars.
Our real hope would lie in a space warp of some sort, one that would open up a gate to another part of the universe and allow us to travel very quickly to some where light years away. Is it possible? I don't know but it would seem if space and time curve, that such a thing would be possible using the correct math to solve the problem. At this point I don't know what math that would be.