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1920年3月27日

1分鐘閱讀

1920年4月的天空

利克天文臺在星雲研究方面的傑出工作

撰文：亨利·諾里斯·羅素

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More by Henry Norris Russell

This article was originally published with the title “The Heavens in April, 1920” in 大眾科學 Magazine Vol. 122 No. 13 (March 1920), p. 338
doi:10.1038/scientificamerican03271920-338

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