This is a partial list of persons who have made major contributions to the development of standard mainstream Cosmology. One simple rule of thumb for who belongs here is whether their contribution is recognized in the canon of standard general relativity textbooks. Some related lists are mentioned at the bottom of the page. // Cosmology, from the Greek: κοσμολογία (cosmologia, κόσμος (cosmos) order + λογια (logia) discourse) is the study of the Universe in its totality, and by extension, humanitys place in it. ...

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• Alexander Alexandrovich Friedman (discovered the expanding-universe solution),

Alexander Alexandrovich Friedman or Friedmann (Александр Александрович Фридман) (June 16, 1888 – September 16, 1925) was a Russian cosmologist and mathematician. ... The Friedmann equations relate various cosmological parameters within the context of general relativity. ...

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• George Gamow (theory work of big bang nucleosynthesis),

George Gamow (pronounced GAM-off) (March 4, 1904 – August 19, 1968) , born Georgiy Antonovich Gamov (Георгий Антонович Гамов) was a Ukrainian born physicist and cosmologist. ... In cosmology, Big Bang nucleosynthesis (or primordial nucleosynthesis) refers to the production of nuclei other than H-1, the normal, light hydrogen, during the early phases of the universe, shortly after the Big Bang. ...

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• Edwin Hubble (formulated the empirical Redshift Distance Law of galaxies),

Edwin Hubble Edwin Powell Hubble (November 20, 1889 – September 28, 1953) was an American astronomer, noted for his discovery of galaxies beyond the Milky Way and the cosmological redshift. ... Hubbles law is the statement in physical cosmology that the redshift in light coming from distant galaxies is proportional to their distance. ...

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• John C. Mather (discovered the anisotropy of the cosmic microwave background radiation),

John C. Mather at NASA John Cromwell Mather (b. ... Look up anisotropy in Wiktionary, the free dictionary. ...

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• Arno Allan Penzias (discovered the cosmic microwave background radiation),

Arno Allan Penzias (born April 26, 1933) is an American physicist and winner of the 1978 Nobel Prize in physics. ...

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George Smoot (discovered the anisotropy of the cosmic microwave background radiation), George Smoot celebrating his Nobel Prize on October 3, 2006 at Lawrence Berkeley National Laboratory. ... Look up anisotropy in Wiktionary, the free dictionary. ...

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• Robert Woodrow Wilson (discovered the Cosmic microwave background radiation),