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\title{Dark Energy as Expansion Within GR: A Timeless Light Model Statement}
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\author{John C. W. McKinley\orcidlink{0009-0005-7097-5035}\\Independent Researcher}
\date{August 30, 2025}
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\footnotetext[0]{This version published at
\href{https://doi.org/10.5281/zenodo.17010816}{https://doi.org/10.5281/zenodo.17010816}.}
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\begin{abstract}
The Timeless Light Model (TLM)\cite{mckinley2025tlmr} accepts dark energy not as a separate substance or mysterious field, but as an intrinsic feature of the spacetime deployment rules already contained within General and Special Relativity. Just as mass--energy curves space, expansion may itself be understood as a built-in aspect of the relativistic framework. This short statement aligns TLM with those prior proposals that treat accelerated expansion as a cosmological constant or geometric term, rather than as exotic energy. This integration simplifies TLM's ontology by subordinating expansion to existing GR rules, potentially yielding testable residuals in cosmic microwave background or gravitational wave data.
\end{abstract}
\section{Introduction}
In mainstream cosmology, the term ``dark energy'' refers to the observed accelerated expansion of the universe \cite{Riess1998,Perlmutter1999}. The dominant model, $\Lambda$CDM, interprets this as arising from a cosmological constant $\Lambda$ term in Einstein’s equations \cite{Einstein1917,Weinberg1989,Carroll2001}. In this view, no additional ``stuff'' is needed: expansion is simply part of the rules of General Relativity, the same way curvature is sourced by stress--energy.
\section{TLM Perspective}
The Timeless Light Model (TLM)\cite{mckinley2025tlmr} emphasizes that spacetime is a delayed deployment layer, with all phenomena projected from timeless instructions. Within that framework, cosmic expansion is not caused by a separate field but emerges as part of the deployment geometry of the Spacetime Deployment Frame (SDF).
Thus, TLM adopts the simplest possible position: accelerated expansion should be treated as part of the relativistic structure itself, not as an extra substance. In the same way that ``mass bends space,'' expansion is a geometric rule within the system of GR/SR.
\section{Prior Proposals}
This perspective echoes several historical and modern treatments:
\begin{itemize}
\item Einstein’s original introduction of $\Lambda$ as a geometric constant in 1917 \cite{Einstein1917}.
\item Modern reviews that interpret dark energy as simply a cosmological constant \cite{Weinberg1989,Carroll2001,Peebles2003}.
\item Approaches that stress the sufficiency of $\Lambda$ as a parameter of GR, without invoking exotic quintessence or modified gravity.
\end{itemize}
\section{Conclusion}
TLM accepts dark energy as nothing more than expansion built into the rules of relativity---an intrinsic constant of the deployment geometry. This position connects TLM with the long tradition of interpreting $\Lambda$ not as a mysterious fluid, but as the simplest extension of GR itself, amenable to tests via horizon-scale phase shifts as outlined in TLM predictions.
\bibliographystyle{plain}
\begin{thebibliography}{9}
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A.~G. Riess et al.
\newblock Observational evidence from supernovae for an accelerating universe and a cosmological constant.
\newblock {\em Astronomical Journal}, 116:1009, 1998.
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\newblock {\em Astrophysical Journal}, 517:565, 1999.
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\newblock Cosmological Considerations on the General Theory of Relativity.
\newblock {\em Sitzungsberichte der Königlich Preussischen Akademie der Wissenschaften}, 1917.
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\newblock \href{https://doi.org/10.12942/lrr-2001-1}{doi:10.12942/lrr-2001-1}.
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\bibitem{mckinley2025tlmr}
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\newblock A Review of the Timeless Light Model: Foundations, Derivations, and Empirical Predictions.
\newblock {\em Zenodo}, July 2025.
\newblock \href{https://doi.org/10.5281/zenodo.16958221}{doi:10.5281/zenodo.16958221}
\end{thebibliography}
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