https://www.britannica.com/science/ether-theoretical-substance
Ether, in physics, a theoretical universal substance believed during the 19th century to act as the medium for transmission of electromagnetic waves (e.g., light and X-rays), much as sound waves are transmitted by elastic media such as air. The ether was assumed to be weightless, transparent, frictionless, undetectable chemically or physically, and literally permeating all matter and space. The theory met with increasing difficulties as the nature of light and the structure of matter became better understood. It was seriously weakened (1887) by the Michelson-Morley experiment, which was designed specifically to detect the motion of Earth through the ether and which showed that there was no such effect. (Ether theories were also used to explain gravity beginning in the 17th century, but they did not have the popularity of those explaining the propagation of light.)
With the formulation of the special theory of relativity by Albert Einstein in 1905 and its acceptance by scientists generally, the ether hypothesis was abandoned as being unnecessary in terms of Einstein’s assumption that the speed of light, or any electromagnetic wave, is a universal constant.
No. no no no no! It was supposed to INTEGRATE with Einstein’s work and be reshaped by Einsteins’ concept! Not abandoned! I’m bringing it back and am reshaping it. The Bold and Underline are my edits and revisions to the above quote.
Ether, in physics, a theoretical universal Location or Environment within the Abstract believed to provide the atmosphere for transmission of electromagnetic waves (e.g., light and X-rays), much as sound waves are transmitted by elastic media such as air. The ether was assumed to be weightless, transparent, frictionless, undetectable chemically or physically, and literally permeating all matter and space. Now, The Ether is the Invisible Force of Integration and Disintegration that causes the Universal Motion within the Integration Pyramid from Quantum, to Meta, to Classic, to Astro Physics and Beyond through all Infinity of Integration.
Ether Physics (Ethereal Physics) is the Mental Physics of Study of The Human Atom and the AIDNS with the Integration of the 12 Ethical Perspective Stages of Human Growth and Evolution. It is the Primary Focus in Pythagorean Psychology, Ontological Physics, and Power Economics.
The Original theory met with increasing difficulties as the nature of light and the structure of matter became better understood. It was seriously weakened (1887) by the Michelson-Morley experiment, which was designed specifically to detect the motion of Earth through the ether and which showed that there was no such effect. (Ether theories were also used to explain gravity beginning in the 17th century, but they did not have the popularity of those explaining the propagation of light.)