All About the Einstein Field Equations - Physics Forums
Feb 26, 2024 · Tiny Numbers, Big Effects: The cosmological constant () in the EFE, originally introduced by Einstein to allow for a static universe, is estimated at less than . It’s small but …
Is Introducing a New Cosmological Model Based on Aether Theory ...
Jul 20, 2025 · The forum discussion centers on the permissibility of introducing a new cosmological model based on aether theory. Sean B. inquires about the acceptance of …
Learn About the Friedmann Equation and the Cosmos
Dec 22, 2017 · The cosmological principle is fundamental to determining the geometry of the universe. For example, homogeneity and isotropy reduce the possible spaces that can exist …
Questioning the timescape model • Physics Forums
Dec 19, 2025 · The discussion centers on the comparison between the standard homogeneous cosmological model, ΛCDM, and the timescape cosmology, which incorporates the …
What Is the Steady-state Model and Why It’s No Longer Viable
Dec 8, 2015 · This preferred frame is a key element in the steady state model and stands in contrast to the cosmological constant, which preserves the equivalence principle. The C Field …
Is the Universe Finite, or Is It Infinite? - Physics Forums
Mar 16, 2024 · Standard cosmological models come in three flavors, open, flat, and closed, [Carroll] whose spatial curvatures are negative, zero, and positive. The open and flat types …
The Units of the Cosmological Constant: eV^2 • Physics Forums
Jun 1, 2022 · I was referring to , the energy density of the cosmological constant. The first paper you cite in the OP is discussing the scale of the energy density, the others discuss the …
Learn About the FLRW Metric and The Friedmann Equation
Jan 9, 2018 · Cosmological redshift is a very useful tool to calculate the rate of expansion since the expansion causes redshift. We can find this relationship using the FLRW metric.
Learn Inflation Balloon Analogy Misconceptions - Physics Forums
Sep 16, 2015 · FIFTH: COSMOLOGICAL TIME There are sometimes attempts to bring cosmological time into the analogy by considering that the 3D center of the balloon represents …
Evolution of the Energy Density Parameters • Physics Forums
Jan 26, 2017 · The discussion highlights the formula for Omega evolution, including contributions from matter, radiation, and the cosmological constant. Key equations discussed include the …