1921年1月的天空

我们在银河系中揭示的恒星宇宙的维度

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大众科学 Magazine Vol 124 Issue 1This article was originally published with the title “The Heavens in January, 1921” in 大众科学 Magazine Vol. 124 No. 1 (), p. 12
doi:10.1038/scientificamerican01011921-12
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