Hubble constant

na. 【天】哈勃常數

學術名詞

• 哈伯常數：物理學、天文學、高中物理學

英文釋義

1. (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