Results for « 哈勃常数 » (cmn)
13590598-n
哈勃常数
,
哈勃 常数
Hubble's constant
,
Hubble constant
,
Hubble's parameter
,
Hubble parameter
[in
cosmology
] the ratio of the speed of recession of a galaxy (due to the expansion of the universe) to its distance from the observer; the Hubble constant is not actually a constant, but is regarded as measuring the expansion rate today
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