Gilese 581 b
In my opinion the most feasible interstellar travel is discussed at this site.
It's theoretically possible to travel great distance measured in the coordinate frame [laboratory frame] in a very short time recorded in the proper frame [rocket frame]. For instance at 1 g constant acceleration for first half of the journey and 1 g constant deceleration for the 2nd half of the journey the rocket could reach Andromeda in 28 years proper rocket time. Time recorded in the coordinate frame would be 2 billion years. That's an extreme example but for Gilese 581 b which is 20 ly distant the journey would take
1.94 arccosh (20_earth years/1.94 + 1) = 6.0466 earth years
In the rocket proper frame and 20 earth years in the Earth coordinate frame. Those left on Earth would be able to receive signals from the ship and after 40 years Earth time we could know when the ship arrived and what's happening in the future
One huge problem would be propulsion and everything associated with it. Look at this paper you can access from waitedavid137 website Modern Relativity. David is a member of this forum.
If we had Davids technology the propulsion issue would be resolved with no fuel requirement. We would need David to give us some feedback on the stress issue for a constant acceleration g_earth. Also I think David understands how to shield the ship. Just reading Davids conclusion section of the paper will give enough infomation to get the gist of his solution.
So what I thought would be fun would be to brainstorm all the other stuff associated with such a monumental project. I'll just add this: So far I've read that the mass of G 581 b is in the range of 5.6 to 13.8 Earth mass and that there isn't any such certainty to the radius. I did see an estimate of ~ 1.96 Earth radius. If that was the case g_surface G 581 b at 5.6_earth mass and 1.96_earth radius would be ~ 1.5 g_earth. That would mean a 200 lb person on Earth would weigh 300 lb on G 581 b. Maybe there's a way to prepare the crew during the voyage?
If you think of an issue that needs to be addressed post that issue rather than putting everything in one post. Then we could brainstorm and find a solution to that issue. Maybe we could have threads designated for issues? Assuming anyone finds this interesting Hope somebody will. Come back NA for this. Need a really smart womens perspective on all the issues. The more the merrier.
BTW I'm more interested in views other than my own.