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1921年6月4日

1分钟阅读

1921年六月的天空

放射性研究如何为我们提供年代的标尺

作者：亨利·诺里斯·罗素

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More by Henry Norris Russell

This article was originally published with the title “The Heavens in June, 1921” in 大众科学 Magazine Vol. 124 No. 23 (June 1921), p. 452
doi:10.1038/scientificamerican06041921-452

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