|The others are slower, by a fair margin - Longshot theoretically tops out at .07c for roughly a century transit time and Orion .03c for a time-in-transit of about 150 years.|
|4.2 LY to Centauri A divided by .9 LY travelled per Year|
Is it possible to built a ship that will get us there? Theoretically, yes. Will the people who arrive there follow what we would consider recognisable human sociological patterns as followed by any of our societies? Not a chance.
-still well educated;
-treating their mission as a kind of sacred duty and maybe even starting a semi-religion belief system around it (in the same way as nationalistic mythology can keep the same function as religion mythology);
-absolutely used to any inconvenience of the trip;
-used to different political system that would evolve on the ship and treating it as natural.