Correction. It was reality-check who linked the proof for both the aether and the doctrine of the partially-entrained ether. Here it is:
"Galactic Drift
In addition to the Earth’s revolution about the Sun, our entire solar system has a galactic velocity component. A very sensitive and precise aether drift experiment might be able to detect this component if conducted at higher altitudes to lessen the slowing effects to a partially entrained aether. Although it is not reported in the textbooks, such an experiment was performed by Dayton Miller18 during the mid-1920s on a mountain top near the Mt. Wilson observatory. The experiment was an utter marvel of science, performed with exquisite care and precision over a period of several years. (See the excellent article by James DeMeo in IE #38 describing the Miller interferometry experiment.)
Miller concluded that the Earth was drifting towards an apex in the Southern Celestial Hemisphere, towards Dorado, the swordfish, right ascension 4 hrs. 54 min., declination of –70° 33’, in the middle of the Great Magellanic Cloud and 7° from the southern pole of the ecliptic. He measured an aether-drift of about 10 km/sec at the location of his interferometer. From this he assumed the Earth was moving through a partially entrained aether which reduced its velocity from 200 km/sec in space, to about 10 km/sec nearer to the surface. This experimental result agrees with the concept of a partially entrained aether. More importantly, this is the tie-breaking experiment that relativity theory cannot explain."
Now bear in mind we don't usually have a default position but we definitely do in this case. An aether has to be considered as virtually proven from the getgo since otherwise light wouldn't move in waves. That light moves in waves itself proves the existence of an aether. This is standard wave action. No medium, no waves. Simple as that.