Couldn't the cosmological constant also have some sort of …
Nov 21, 2025 · Why should we believe that the cosmological constant is indeed a constant, and not another parameter that changes with spacetime dynamics? Obviously it would make the …
Does the Cosmological Principle in any way underpin Big Bang …
Aug 25, 2023 · Am I correct in thinking that the Cosmological Principle has been derived entirely from observational data, and is in no way an assumption? Does the Cosmological Principle …
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 …
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 …
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 …
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 …
Is Introducing a New Cosmological Model Based on Aether Theory ...
Jul 20, 2025 · Is it ok to introduce a new model for cosmology here? It is a variation on the aether theory I don't think has been noticed or explored specifically and I think has some clout and …
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.
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 …
At What Velocity Does the Universe Expand and Can It Be Faster …
Feb 9, 2016 · You may sometimes see statements that cosmological inflation caused the universe to expand faster than c, or that the edge of the observable universe occurs at the place where …