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This lesson discusses the history of scientific theories about the universe, beginning with early concepts like the Cosmic Egg containing all matter and the geocentric model of the solar system. It then outlines several important developments, including the heliocentric model placing the Sun at the center, the theory of an atomistic universe made of fundamental particles, the idea of a finite universe with a beginning from an infinitely dense point, and modern theories of an expanding universe and the possibility of multiple universes.Read less