1921年九月的天象

在汉密尔顿山观测到的不明天体

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大众科学 Magazine Vol 125 Issue 10This article was originally published with the title “The Heavens in September, 1921” in 大众科学 Magazine Vol. 125 No. 10 (), p. 168
doi:10.1038/scientificamerican09031921-168
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