Also known as dark night sky paradox, photometric paradox, Olbers paradox
cosmological contradiction between the observed darkness of the night sky and a static universe model
As more distant stars are revealed in this animation depicting an infinite, homogeneous, and static universe, they fill the gaps between closer stars. Olbers' paradox says that because the night sky is dark, at least one of these three assumptions must be false.
Olbers' paradox, also known as the dark night paradox or Olbers and Cheseaux's paradox, is a historical argument in astrophysics and physical cosmology that says the darkness of the night sky conflicts with the assumption of an infinite and eternal static universe. If the universe were static, homogeneous at a large scale, and populated by an infinite number of stars, any line of sight from Earth must end at the surface of a star and if light from an infinite distance could reach Earth, the night sky should be completely illuminated and very bright. This contradicts the observed darkness and non-uniformity of the night sky. Modern cosmological models do not make all of these assumptions.
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