1923年十二月的天空

关于星云的数学理论和观测事实

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大众科学 Magazine Vol 129 Issue 6This article was originally published with the title “The Heavens in December, 1923” in 大众科学 Magazine Vol. 129 No. 6 (), p. 410
doi:10.1038/scientificamerican1223-410
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