Changes

== Support for the Big Bang theory ==

== Support for the Big Bang theory ==

The Hubble redshift in absorption and emission lines in the spectra of distant cosmic objects, discovered by Edwin Hubble in 1929, is claimed as a source of evidence for the [[Big Bang theory]].<ref>Edwin Hubble (1929). [http://www.pnas.org/cgi/reprint/15/3/168/ "A relation between distance and radial velocity among extra-galactic nebulae"]. Proceedings of the National Academy of Sciences 15: 168–173.</ref> The redshift, the expanded wavelength of light, suggests that these objects are moving away from Earth due to the expansion of the universe. It also suggests that the universe is undergoing accelerating expansion for an unknown reason.

The Hubble redshift in absorption and emission lines in the spectra of distant cosmic objects, discovered by Edwin Hubble in 1929, is claimed as a source of evidence for the [[Big Bang theory]].<ref>{{cite web |title=A relation between distance and radial velocity among extra-galactic nebulae |author=Edwin Hubble |date=January 17, 1929 |publisher=Proceedings of the National Academy of Sciences |pages=15: 168–173|url=http://www.pnas.org/content/15/3/168.short |accessdate=June 9, 2013}}</ref> The redshift, the expanded wavelength of light, suggests that these objects are moving away from Earth due to the expansion of the universe. It also suggests that the universe is undergoing accelerating expansion for an unknown reason.

Actually the reason is known and confirmed by Supernova Cosmology Project team in 1998 with accuracy to one standard deviation (the second term of Taylor series of Hubble "constant" as function of time is causing the illusion of accelerating expansion of space with  

Actually the reason is known and confirmed by Supernova Cosmology Project team in 1998 with accuracy to one standard deviation (the second term of Taylor series of Hubble "constant" as function of time is causing the illusion of accelerating expansion of space with  

:<math>H_o=c/R_E</math>,

:<math>H_o=c/R_E</math>,

is Hubble constant, <math>c</math> is speed of light in vacuum, and <math>R_E</math> is "Einstein radius", or radius of curvature of space, about 13 billion light years).

is Hubble constant, <math>c</math> is speed of light in vacuum, and <math>R_E</math> is "Einstein radius", or radius of curvature of space, about 13 billion light years).

[[Category: Astronomy]]

[[Category: Astronomy]]