Cosmological lambda (Λ), reinterpreted as an augmentation of spacetime curvature k, by a universal stretch factor SU, ΛSu (herein denoted ΛRu), was previously derived within the ROtational Newtonian Dynamics-Universal framework (RONDu1 or Ru1) by Seth (2025b). Ru1 models spacetime as a perfect fluid-like continuum with elasticity and compressibility (elasto-fluid) within a black hole universe (BHU) with ΛRu, that varies inversely with radius, intersecting ΛCDM (~1.11×10-52 m-2) at the CMB Hubble epoch (r~13.8-14.5 Gly). In this work, ΛRu is tested against Λ predicted by quantum field theory (QFT) at three limits...

RONDu1 (ROtational Newtonian Dynamics - universal1) derived herein, models the universe as a rotating Kerr-Newman black hole (BHU) that induces a spacetime stretch, formulated as a dimensionless factor SU – a scalar, quantifying spacetime deformation from frame-dragging and compression. Spacetime is modeled as an elastic fluid regime in a special case of Poisson elasticity. The shear modulus is considered negligible (μ=0) while the Poisson ratio ν=0.5..

Despite a century of indirect evidence for dark matter, direct detection remains elusive. As experimental sensitivity improves, the question arises: what is the probability of detecting dark matter in the coming decades? This paper presents a simplified Bayesian model that accounts for the current state of research and the long-standing history of null results. Using basic assumptions and logical inference, the likelihood of direct detection occurring within the next 10 to 100 years is estimated...

In the rotating frame of galaxies, a galactic-scale Hubble parameter (HG), akin to the Hubble constant of the universe, is derived alongside a spacetime stretch parameter (SG) in a novel, fully constrained, model termed ROND (ROtational Newtonian Dynamics). Applied as correction factors to the expected Keplerian velocity profiles (ve), HG and SG naturally account for the observed velocity profiles of galaxies, without considering dark matter or dark energy...

Data on early black holes suggests a redshift bias and an underlying curvature in the cosmos, further supported by fine-structure constant variations. The discrepancy between the early-universe Hubble constant H0E=67.4 km/s/Mpc and the late-universe Hubble constant H0L=73.3 km/s/Mpc is reconciled through spacetime curvature k, resolving the Hubble Tension...