If we were going to launch a ship meant to take a one way trip and colonize another planet outside of our solar system, what location on earth would serve as the best launch point? Could we use one that already exists or would we have to build a new one? I'm talking about a ship like in the one in the movie 'Pandorum' or the video game 'Civilization, Beyond Earth', with people, technology, food, plants etc. on it.
closed as too broad by Phiteros, Hohmannfan♦, Nathan Tuggy, Russell Borogove, Brian Tompsett - 汤莱恩 Aug 30 '16 at 7:27
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Here is my take on this. As people look at the economics of space, big things in space only start to make sense when the materials to build them are in space. That would mean the refineries and factories are also in space, and the people who work there. This is orbital space, not on the surface of any large planet or moon. So we are talking about orbital settlements harvesting asteroids. Looking at orbital space the most likely spot for asteroid exploitation would be lagrange points. Possibly Earth / Moon lagrange points or the trojan asteroids, the Jupiter lagrange points. If we are already building huge spinning colonies in space, building a multi generational craft to travel to another star is not as big a leap.