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Hubble constant

   Also found in: Encyclopedia, Wikipedia, Hutchinson 0.01 sec.
Hubble constant
n
(Astronomy) the rate at which the expansion velocity of the universe depends on distance away. It is currently estimated to lie in the range 60-80 km s-1 megaparsec-1 Also called Hubble parameter
ThesaurusLegend:  Synonyms Related Words Antonyms
Noun1.Hubble constant - (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
Hubble parameter, Hubble's constant, Hubble's parameter
cosmogeny, cosmogony, cosmology - the branch of astrophysics that studies the origin and evolution and structure of the universe
constant - a number representing a quantity assumed to have a fixed value in a specified mathematical context; "the velocity of light is a constant"
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Q: So the Hubble constant is a measure of the expansion rate of the universe?
Cosmologist sheds light on Hubble constant by The Star (Amman, Jordan)
The observation is a key element of a major effort to measure the expansion rate of the Universe, known as the Hubble Constant, with greatly improved precision.
Radio astronomers demonstrate vital tool for unraveling mystery of ... by Asian News International
The Hubble Space Telescope helped to better the estimates of the Hubble constant to reduce errors from 50 percent and bring such errors down to a meager ten percent.
The Hubble Space Telescope Brings Us the Universe by Ann Marier / Computers and Internet community
 
 
 
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