| 单词 | Hubble constant |
| 释义 | Hubble constant (once / 513884 pages) n WORD FAMILY Hubble constant USAGE EXAMPLESFor years, those predictions have disagreed with direct measurements of the current rate of cosmic expansion — also known as the Hubble constant. Nature(Apr 10, 2016) “From the point of view of measuring the Hubble constant, that's our gold-plated source”, says Holz. Nature(Mar 22, 2016) The rate of expansion, known as the Hubble constant, provides a measure of the age and size of the Universe. Nature(Mar 04, 2015) n (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 Syn|Hyper Hubble parameter, Hubble's constant, Hubble's parameter constant a number representing a quantity assumed to have a fixed value in a specified mathematical context |
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