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1922年3月1日

1分鐘閱讀

1922年3月的天空

美國變星觀測者協會；其工作及其需求

作者：Henry Norris Russell

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This article was originally published with the title “The Heavens in March, 1922” in 大眾科學 Magazine Vol. 126 No. 3 (March 1922), p. 207
doi:10.1038/scientificamerican0322-207

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