Changes

'''The Hubble law''' relates the velocity (<math>v</math>) of the [[Expanding universe|expansion of the universe]] to the distance (<math>r</math>) to the source. This simple physical law was established by [[Edwin Hubble|E.Hubble]] who in 1929 interpreted the new observations into conclusion that the universe is expanding, and this interpretation of the evidence of [[redshift]]s found in starlight has been strengthen ever since.<ref name="starlight">{{cite book| last = Hartnett| first = John| authorlink = | title = Starlight, Time and the New Physics| publisher = Creation Ministries International|year = 2007|isbn = 978-0-949-906687|pages=57-61|quote=}}</ref> In simple words, the law states that the universe is indeed expanding in a way that further the galaxy receding from us, the greater its receding velocity.<ref name="CSR">{{cite book  

'''The Hubble law''' relates the velocity (<math>v</math>) of the [[Expanding universe|expansion of the universe]] to the distance (<math>r</math>) to the source. This simple physical law was established by [[Edwin Hubble|E.Hubble]] who in 1929 interpreted the new observations into conclusion that the universe is expanding, and this interpretation of the evidence of [[redshift]]s found in starlight has been strengthen ever since.<ref name="starlight">{{cite book| last = Hartnett| first = John| authorlink = | title = Starlight, Time and the New Physics| publisher = Creation Ministries International|year = 2007|isbn = 978-0-949-906687|pages=57–61|quote=}}</ref> In simple words, the law states that the universe is indeed expanding in a way that further the galaxy receding from us, the greater its receding velocity.<ref name="CSR">{{cite book  

|author=Moshe Carmeli

|author=Moshe Carmeli

|title=Cosmological Special Relativity, The Large-Scale Structure of Space, Time and Velocity, 2nd Edition

|title=Cosmological Special Relativity, The Large-Scale Structure of Space, Time and Velocity, 2nd Edition

:<math>v=H_0 r</math>

:<math>v=H_0 r</math>

where:

where:

*<math>H_0</math> is a controversial constant of proportionality called the '''''[[Hubble constant]]'''''{{#tag:ref|According to Capria, the value of [[Hubble constant]] depends on the cosmological model<ref name="Capria"/>:

*<math>H_0</math> is a controversial constant of proportionality called the '''''[[Hubble constant]]'''''{{#tag:ref|According to Capria, the value of [[Hubble constant]] depends on the cosmological model:<ref name="Capria"/>

*In the de Sitter space-time it is a true constant

*In the de Sitter space-time it is a true constant

*In the [[Relativistic cosmology|FLRW space-time]] it is in fact a function of cosmic time

*In the [[Relativistic cosmology|FLRW space-time]] it is in fact a function of cosmic time

According to [[John Hartnett|J.Hartnett]] the Hubble constant is not truly constant but it has emerged that there is an inherent scale dependence to its value. Thus, its determination depends on method used and on the distances to the sources.<ref name="starlight"/> The Hubble law written in an invariant way that enables one to derive a four-dimensional transformation similar to the [[Lorentz transformation]] is part of [[Moshe Carmeli|M.Carmeli]]'s new theory of [[Cosmological special relativity]].<ref name="CSR"/>  

According to [[John Hartnett|J.Hartnett]] the Hubble constant is not truly constant but it has emerged that there is an inherent scale dependence to its value. Thus, its determination depends on method used and on the distances to the sources.<ref name="starlight"/> The Hubble law written in an invariant way that enables one to derive a four-dimensional transformation similar to the [[Lorentz transformation]] is part of [[Moshe Carmeli|M.Carmeli]]'s new theory of [[Cosmological special relativity]].<ref name="CSR"/>  

==See Also==

==See also==

*[[Quasar]]

*[[Quasar]]