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[[Image:Allskysurvey.jpg|thumb|"All Sky Survey"]]

[[Image:Allskysurvey.jpg|left|"All Sky Survey"]]

    

    

'''Physical cosmology''' is the branch of physics and astrophysics that deals with the study of the physical origins of the Universe and the nature of the Universe on its very largest scales. In its earliest form it was what is now known as [[celestial mechanics]], the study of the [[celestial sphere|heavens]]. The Greek philosophers [[Aristarchus of Samos]], [[Aristotle]] and [[Ptolemy]] proposed different cosmological theories. In particular, the [[geocentric]] [[Ptolemaic system]] was the accepted theory to explain the motion of the heavens until [[Nicolaus Copernicus]], and subsequently  [[Johannes Kepler]] and [[Galileo Galilei]] proposed a [[heliocentric]] system in the [[16th century]]. This is known as one of the most famous examples of [[epistemological rupture]] in physical cosmology.

'''Physical cosmology''' is the branch of physics and astrophysics that deals with the study of the physical origins of the Universe and the nature of the Universe on its very largest scales. In its earliest form it was what is now known as [[celestial mechanics]], the study of the [[celestial sphere|heavens]]. The Greek philosophers [[Aristarchus of Samos]], [[Aristotle]] and [[Ptolemy]] proposed different cosmological theories. In particular, the [[geocentric]] [[Ptolemaic system]] was the accepted theory to explain the motion of the heavens until [[Nicolaus Copernicus]], and subsequently  [[Johannes Kepler]] and [[Galileo Galilei]] proposed a [[heliocentric]] system in the [[16th century]]. This is known as one of the most famous examples of [[epistemological rupture]] in physical cosmology.