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 drives the …
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 due to symmetry.
How does the symbol Λ cosmological constant relate to Ω_Λ or ρ_Λ?
Jun 18, 2022 · The discussion clarifies the relationship between the cosmological constant (Λ) and the dark energy density (ρ_Λ), emphasizing that they represent the same physical concept expressed in …
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 vs. the …
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 have infinite …
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 constant appearing in …
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 the singularity and …
How Does the Cosmological Constant Λ Define the Cosmic Scale of …
Jul 29, 2008 · The discussion centers on the cosmological constant Λ and its implications for the cosmic scale of space-time, specifically through the equation Λ = 1/L², where L represents the invariant …
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.
Does the Cosmological Principle in any way underpin Big Bang Theory ...
Aug 25, 2023 · The Cosmological Principle, which asserts that the universe is homogeneous and isotropic, is fundamentally supported by observational data rather than assumptions. It plays a …