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 …
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 …
Redshifts of nearby galaxies • Physics Forums
Oct 7, 2024 · The discussion centers on the redshifts of nearby galaxies, emphasizing that these measurements are taken from Earth rather than the Milky Way's center, which affects their …
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 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 …
Why isn't cosmological constant a mass of the graviton?
May 29, 2017 · The discussion centers on the relationship between the cosmological constant and the mass of the graviton, questioning why the cosmological constant is not treated as a mass …
Discussion of "Two-Time Physics" (I. Bars) and its potential ...
Oct 14, 2025 · Hello everyone, I am seeking to better understand the conceptual foundations and potential consequences of "Two-Time Physics" (2T-physics), as developed by Itzhak Bars and …
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 …