Einstein-de Sitter model

astronomy

Also known as: Einstein-de Sitter universe

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Last updated

June 26, 2026

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The Einstein-de Sitter model, proposed in 1932, is a cosmological model that assumes the universe has zero spatial curvature, meaning its geometry is Euclidean. This model is considered a separating case between the closed and open Friedmann models.1

Key characteristics of the Einstein-de Sitter universe include:
* Big Bang Origin: Time begins with a big bang.1
* Infinite Volume: The spatial geometry is Euclidean, leading to an infinite total volume.1
* Receding Galaxies: Galaxies move away from each other, with the recession rate asymptotically approaching zero over time.1
* No Cosmological Constant: It assumes the cosmological constant is zero.1

While its space-time is not globally flat, the unique definition of its spatial geometry and evolutionary properties led many to consider it a strong candidate for describing the actual universe.1

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cosmology
The Einstein–de Sitter universe
In 1932 Einstein and de Sitter proposed that the cosmological constant should be set equal to zero, and they derived a homogeneous and isotropic model that provides the separating case between the closed and open Friedmann models; i.e., Einstein and de Sitter…
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In 1932 Einstein and de Sitter proposed that the cosmological constant should be set equal to zero, and they derived a homogeneous and isotropic model that provides the separating case between the closed and open Friedmann models; i.e., Einstein and de Sitter…
Read More