Incorrect. That experiment was to determine if the aether is a background medium of space which light flows through.
Kindly read the article. The experiment is merely measuring the velocity of light. Aether is just a medium for light like ripples in water.
Morley wrote to his father that the purpose of the experiment was “to see if light travels with the same velocity in all directions.”
https://physicsworld.com/a/michelson-morley-experiment-is-best-yet/ (Archive)
Michelson–Morley experiment is best yet
“ Physicists in Germany have performed the most precise Michelson-Morley experiment to date, confirming that the speed of light is the same in all directions. The experiment, which involves rotating two optical cavities, is about 10 times more precise than previous experiments – and a hundred million times more precise than Michelson and Morley’s 1887 measurement. ”
The purpose is to measure the speed of light in different directions.
MMX was more than just about measuring the velocity of light.
Dorothy Michelson Livingston, Michelson's daughter, describes the experiment in The Master of Light (University of Chicago Press, 1979), her biography of her father. The following is excerpted from her book:
"In April 1887, Morely wrote his father that he and Michelson had begun a new experiment, the purpose of which was "to see if light travels with the same velocity in all directions." They also hoped to learn from the experiment the speed of the Earth in orbit and in movement with the solar system; whether the ether was moving or stationary; and, most important to Michelson, some clear proof of the ether's actual existence, with which to confront skeptics.”
https://www.the-scientist.com/books-etc/michelson-morley-the-great-failure-63642 From:
On the Relative Motion of the Earth and the Luminiferous Ether (1887)
by Albert Abraham Michelson and Edward Morley
"On the undulatory theory, according to Fresnel, first, the ether is supposed to be at rest except in the interior of transparent media, in which secondly, it is supposed to move with a velocity less than the velocity of the medium in the ratio, where n is the index of refraction. These two hypotheses give a complete and satisfactory explanation of aberration. The second hypothesis, notwithstanding its seeming improbability, must be considered as fully proved, first, by the celebrated experiment of Fizeau,[2] and secondly, by the ample confirmation of our own work.[3]
The experimental trial of the first hypothesis forms the subject of the present paper."