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在宇宙中建造永久性的人类居住地,是人类21世纪最诱人的科学探索主题之一。 1977年,美国普林斯顿大学奥尼尔博士出版了《宇宙移民岛》一书,描绘了宇宙城的建设方案。奥尼尔博士设想,在地球和月球引力所及的范围内,大约距地球38.4万千米的地方建设人类的第二故乡——巨大的宇宙移民岛。这宇宙岛在太空中以一定速度旋转,产生向心力模拟地球的重力,岛内培植土壤,加上入射的阳光,
Building permanent human settlements in the universe is one of the most enticing scientific exploration themes of mankind in the 21st century. In 1977, Dr. O’Neill of Princeton University published the book “Cosmic Migrants Island” and described the construction plan of cosmic city. Dr. O’Neill envisions building a second hometown of mankind, the huge cosmic immigrant island, about 384,000 kilometers from Earth within the sphere of gravity of the Earth and the Moon. This cosmic island rotates at a certain speed in space, generating a centripetal force that simulates the gravity of the Earth. Soil is planted in the island, coupled with incident sunlight,