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abstraction > hypothesis > theory > astronomy theory > cosmology theory > big bang > open universe

open universe comparison table

Subject	has definition	is a kind of	has geometry of space
big bang	One of three standard Big Bang models that were formulated by Friedmann and Lemaitre of an isotropic and homogeneous universe composed of expanding matter and radiation. In these models space is unbounded.	cosmology theory
open universe	Cosmological model in which the universe continues to expand forever; its space-time geometry is hyperbolic, or "open".	big bang	negative curvature

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