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Pub 2014-11-01 408 Chinese People Post Press pale blue exploring human space home first reviewed the status of various ideas about the universe in the history of mankind. then according to the 20th century Since the middle of the solar system. space exploration achievements made full range of inspection. and to assess the human into space for various reasons. and finally the author himself a long-term vision for the future of humanity in space homes. Pale blue exploring human space home is a world-renowned American astronomer and science writer Carl Sagan (Carl Sangan) 60 years old classics published science. its themes related to human survival and long-term prospects of civilization and progress - - humans how to find and build a new home in the coming years in space. Pale blue exploring human space home like a narrative sty...