To conquer the Universe I think that when we will want to make our first interestellar voyage, we will not have the technology of achieve even velocities of a tenth part of light speed. Then, there are two options a)Send a small number of persons, hibernated (in the style of Clark's "2001, space oddissey") b)Send a huge spaceship (In the style of other's Clark novel "Rendezvous with Rama")where, say, can travel thousandths of people that reproduct, and then someone will arrive Which option to choose? It seems that the first candidate have to be the 3-system of alpha centauri, because is the nearer(4.2 a.l), but don't have any planet. Barnard's star has a planet, but it's a bit more far away (6 a.l). Which have to be the first star to travel to? (if you prefer another star, tell me) And, if in a planet, we find living things, in a early stage of development (for example things like fishes, reptils or little mammals) we should try to not interfere and let the echosystem go its way, or should we try to terraform the planet? May the force be with you!!!