Vol. 10 (2007) > lrr-2007-4

doi: 10.12942/lrr-2007-4
Living Rev. Relativity 10 (2007), 4

The Hubble Constant

1 Jodrell Bank Centre for Astrophysics, University of Manchester, Turing Building, Manchester M13 9PL, U.K.

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Article Abstract

I review the current state of determinations of the Hubble constant, which gives the length scale of the Universe by relating the expansion velocity of objects to their distance. In the last 20 years, much progress has been made and estimates now range between 60 and 75 km s^-1 Mpc^-1, with most now between 70 and 75 km s^-1 Mpc^-1, a huge improvement over the factor-of-2 uncertainty which used to prevail. Further improvements which gave a generally agreed margin of error of a few percent rather than the current 10% would be vital input to much other interesting cosmology. There are several programmes which are likely to lead us to this point in the next 10 years.


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Article Citation

Since a Living Reviews in Relativity article may evolve over time, please cite the access <date>, which uniquely identifies the version of the article you are referring to:

Neal Jackson,
"The Hubble Constant",
Living Rev. Relativity 10,  (2007),  4. URL (cited on <date>):

Article History

ORIGINAL http://www.livingreviews.org/lrr-2007-4
Title The Hubble Constant
Author Neal Jackson
Date accepted 11 September 2007, published 24 September 2007
UPDATE http://www.livingreviews.org/lrr-2015-2
Title The Hubble Constant
Author Neal Jackson
Date accepted 14 August 2014, published 24 September 2015
Changes Major revision, updated and expanded. The number of references has increased from 179 to 242.
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