The History of the Aether Concept: Nine Mechanistically Distinct Families and the Limits of a Blanket Refutation
Year: 2026
Type: preprint
Abstract: The Theory of NeoGravity states a physical cause for gravitation. Space is not an empty void; it is filled, everywhere, by the Ether Plenum. Every body gives off radiation without pause — the Sun, the Earth, a stone in the hand — most of it invisible, across the whole spectrum from radio waves to gamma rays. That radiation carries momentum outward, into the Plenum. The Plenum returns it, inward, on the body that sent it out; Newton’s third law allows nothing else. That returned load is gravity, the Radiative Undertow. It is compressive, so the Plenum settles denser toward a mass, and a body falls by answering to the state of the Plenum where it is. Nothing acts across empty space. In this account the curvature of a four-dimensional spacetime metric describes the Plenum’s settled profile and does not cause it: Newton’s potential, Einstein’s metric and the gravitational field are three names for one state of the Ether Plenum under load. The aether was disproven in 1887. That proposition is among the most widely repeated claims in the history of physics, and it is imprecise in a way that matters. What the experiment refuted was a property and not a concept: a medium at absolute rest, which two of the nine families of aether required and seven did not, so the sentence reaches those two and no further. Aether theories were never a single hypothesis. The historical record falls into nine mechanistically distinct families: celestial substance, tensioned continuum, fluid-vortex plenum, wave-bearing subtle fluid, elastic-repulsive corpuscular medium, elastic solid, fluid-vortex matter, corpuscular push-gravity medium, and field or quantum-vacuum medium. They differ in kind rather than in detail, making incompatible claims about what the medium is made of, whether it moves, whether it is continuous, and what it is for. The Michelson–Morley experiment tested one specific property: a medium at absolute rest through which the Earth moves, producing a directionally dependent light speed. That property is definitional for two of the nine families, the wave-bearing subtle fluid of Huygens, Young and Fresnel, and the elastic solid of Cauchy, Green, MacCullagh and Stokes. Those two are decisively refuted, and modern rotating optical-cavity experiments have sharpened the refutation to about one part in 10¹⁷. The remaining seven were abandoned for unrelated reasons, superseded by better accounts, or, in the case of the ninth family, persist in contemporary physics under other names. The 1887 result refutes a property and not a concept: it reaches the two families for which a detectable rest frame is definitional, and no further. Five statements say what the Ether Plenum is. They are set down before any result, in one place, so that nothing can be slipped in afterwards to rescue a number that comes out wrong; that is their purpose, and the reader is entitled to hold the theory to it. The first two say nothing that is not already true of water, or of steel, or of air. The Plenum is neither created nor destroyed; and when it is pushed, it moves. Any physicist would grant those two of any material at all, and they cost the theory nothing. It is the three that follow that commit it. Squeeze the Plenum and it presses back, with exactly one third of the energy it holds; and that fraction is not chosen but forced, because whatever fills it has no mass. Twist it and it answers as a fluid does that remembers, for a moment, having been a solid: stiff against a quick disturbance, yielding to a slow one. And a body holds the Plenum about it denser than it is far away, by an amount fixed by the body’s mass; matter and Plenum trade momentum through that and through nothing else. This, then, is all the theory asks of its reader: five statements about the Ether Plenum, and no more. Everything else in the forty papers is drawn from those five, and where a step remains to be taken, the paper names it. Where the theory agrees with Newton and with Einstein it says so, and in the weak field, where nearly all the testing has been done, it cannot be told apart from either. Where it differs from them it names the measurement that would settle the matter, and where a proposal of its own has failed, the failure is kept in print beside the results, with the arithmetic that undid it. The theory is new, and it is the work of one independent researcher; these forty papers are its case, made as fully as the evidence allows. Every number in them is recomputed by a verification program that anyone may download and run: https://github.com/worldlibrary-hub/NeoGravity.
Author: Guagliardo, John
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7204170848
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