NOUN
- (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
How To Use Hubble constant In A Sentence
- Nowadays the constant of proportionality is known as the Hubble constant.
- The expansion rate became known as the Hubble constant; Hubble thought it was 500 kilometers per second every 3.26 million light-years, that is, every megaparsec. A Grand and Bold Thing
- Currently, most astronomers agree that the value of the Hubble constant is about 71 kilometers per second per megaparsec a megaparsec is 3.2 million light-years. The Big Honkin’ Universe « UDreamOfJanie
- The Hubble Constant is highlighted in the National Geographic article, and conventionally accepted cosmogonies are presented as proof for the old age of the Universe.