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1915年4月3日

1分鐘閱讀

四月的天空

星雲；其本質、尺寸和離我們的距離

作者：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” in 大眾科學 Magazine Vol. 112 No. 14 (April 1915), p. 318
doi:10.1038/scientificamerican04031915-318

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