A Simple and Concise Definition: From the Universe to the Big Bang, From the Big Bang to the Universe

Upon observation of the nocturnal sky, one encounters a vast distribution of luminous structures. Each point of light visible to the observer constitutes an individual galaxy; these galaxies are bound and collectively form large-scale structures known as clusters.

An assemblage of such clusters — analogous to an ocean composed entirely of H₂O — constitutes what is referred to as the Universe.

Considering solar systems, a central stellar object is observed, about which planetary objects orbit; all such constituents are composed entirely of atoms. Atoms themselves are formed from fundamental subatomic particles, namely electrons and protons.

The Saleh Theory posits that the photon represents a novel atomic entity with respect to the electron and proton. Furthermore, Cidtonium is defined as the atom of the photon; Irenium as the atom of Cidtonium; and Irenium is itself constituted from a still more fundamental particle designated Ilitonium.

Should one seek to characterise the nature of the Big Bang — or the state at time t = 0 — this corresponds to the Irenium particle itself.

The Universe, in its totality, may accordingly be defined as an extensive ensemble of clusters in collective motion, traversing the cosmic expanse in a manner analogous to an ocean in cosmos.

Proceeding from a macroscopic to a microscopic perspective, the hierarchy descends from the Universe to Ilitonium; conversely, ascending from the microscopic to the macroscopic, the progression leads from Ilitonium back to the Universe.

References:

[1] Saleh, Gh. "A Clear and Fluid Explanation of the Structure of the Universe Using the Definition of Macroscopic and Microscopic Sets in the Universe." Saleh Theory, 20 May. 2026, https://saleh-theory.com/article/a-clear-and-fluid-explanation-of-the-structure-of-the-universe-using-the-definition-of-macroscopic-and-microscopic-sets-in-the-universe

[2] Saleh, Gh. "A New Discoveries Concerning Sub-Photon Particles: Cidtonium, Irenium and Ilitonium In the Universe." Saleh Theory, 06 Jan. 2026, https://saleh-theory.com/article/a-new-discoveries-concerning-sub-photon-particles-cidtonium-irenium-and-ilitonium-in-the-universe

[3] Saleh, Gh. "A Simple and Fluent Explanation of the Big Bang (Pre-Big Bang, Onset, Mid-Term, and End) in the Universe, Utilising Mathematical and Physical Equations, Logic, and Philosophy." Saleh Theory, 24 Dec 2025, https://saleh-theory.com/article/a-simple-and-fluent-explanation-of-the-big-bang-pre-big-bang-onset-mid-term-and-end-in-the-universe-utilising-mathematical-and-physical-equations-logic-and-philosophy

[4] Saleh, Gh. "From Macro to Micro." Saleh Theory, 17 May 2019, https://saleh-theory.com/article/from-macro-to-micro