People are lining up to go already. 4 people at a time every two years to start. There is no way back to Earth. As much as space, planets, stars, etc., is interesting and fascinating because of the vastness and infinite discoveries possible, I would NOT be interested in going.
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Can't see how anyone with children could willingly go or even want to.
Since it's a one way trip, no coming back ever, it will be some very special people going. The first group will certainly make history but will never enjoy it.
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I suspect the people who will be first to volunteer will be without children. Since there's no return, I hope for the sake of the volunteers there is a stringent, demanding, psychological screening process.