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宏观世界有多大?今天,用射电和光学望远镜,人类已经可观测到130亿光年的距离(1光年等于光走1年的距离,约10万亿公里),
Today, with radio and optical telescopes, human beings have observed 13 billion light-years of distance (1 light-year equals 1 year of light travel, about 10 trillion kilometers),