This part is out of the point. I believe that there are more than 1 million earth-like planets in which human can manage to settle down. However, the distance between each other is more less several ten light-years minimum, or we would have found one by now. The question is, under the restricted physical limit of light speed, any supposed inter-stellar immigration would take more than a century or more. This is to say, that the star ships, or the immigration fleets, have to be built to suppor
【在 f****a 的大作中提到】 : : This part is out of the point. : I believe that there are more than 1 million earth-like planets : in which human can manage to settle down. However, the distance : between each other is more less several ten light-years minimum, : or we would have found one by now. : The question is, under the restricted physical limit of light : speed, any supposed inter-stellar immigration would take more : than a century or more. This is to say, that the star ships, or : the immigration fleets, have to be built to suppor