Hubble constant


Also found in: Thesaurus, Encyclopedia, Wikipedia.
Related to Hubble constant: parsec

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
ThesaurusAntonymsRelated WordsSynonymsLegend:
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
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"
Translations
References in periodicals archive ?
This image was taken in 2015 with Hubble's Wide Field Camera 3, as part of a project to improve the precision of the Hubble constant a figure that describes the expansion rate of the universe.
The idea could help solve an ongoing conflict over the measurement of the universe's current expansion rate, dubbed the Hubble constant.
Getting a better value for the Hubble constant and by extension, a better understanding of dark energy could be right on the horizon.
A new study by an undergraduate student under Barger provides further evidence of our being situated inside KBC and also helps reduce the variations among different measurements of the Hubble Constant.
Currently, the different methods to measure the Hubble constant produce slightly different results but even these small changes can result in significantly different scenarios for the predicted evolution and expansion of the universe.
By greatly narrowing down the Hubble constant (the rate at which the Universe expands), the telescope helped refine estimates of the Universe's age to roughly 13.
The Hubble constant is a fundamental quantity that measures the current rate at which our universe is expanding.
The value of the Hubble constant is a key ingredient in determining the age and size of the universe.
the distance scale through the Hubble constant, and the ages of stars.
Q: So the Hubble constant is a measure of the expansion rate of the universe?
This measure of the current expansion rate is called the Hubble constant.
The key to determining the age of the universe is to make an accurate measurement of the rate at which it is expanding - the so-called Hubble constant.