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单词 hubble constant
释义 hub·ble constant
\¦həbəl-\ noun
Usage: usually capitalized H
Etymology: after Edwin P. Hubble died 1953 American astronomer
: a proportionality constant indicative of the rate of expansion of the universe that is used in relating the apparent velocity of recession of a distant galaxy and its distance
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更新时间:2024/11/11 19:24:16