Quoting his comment from a FB Group.*
No, it wasn't due to the annual movement of the Earth, it was to do with light passing through the aether. There should have been a slowing down of the light beam through the aether. After all, the aether was invented as the medium which light waves pass through.
Now, this would normally mean Michelson Morley was NOT concerned with any aether wind and definitely if any at all not the one due to the orbital speed of Earth, as the Heliocentrics Michelson and Morley supposed to be the case.
"It compared the speed of light in perpendicular directions, in an attempt to detect the relative motion of matter through the stationary luminiferous aether ("aether wind")."
In fact, this doesn't tell precisely whether this movement of matter through a supposedly stationary aether was that of rotation or of orbit. Here are some added considerations on that one.
"Earth rotates once in about 24 hours with respect to the Sun, but once every 23 hours, 56 minutes, and 4 seconds with respect to the stars (see below)."
"40,075.017 km equatorial circumference."
40075.017 km / 23 hours, 56 minutes, and 4 seconds
40075.017 km / 1436 min 4 sec
40075.017 km / 86164 sec
40075.017 km / 23.93444444444444444 h
Average orbital speed 29.78 km/s
29780 m / s
29780 m / s / 465.10163177196973222508[((m)/(s))]
29780 / 465.10163177196973222508 = 64.02901638195187788750057
So, any aether wind would be 64 times greater along the orbital velocity than along the rotational one, and I even took the rotational speed at equator, which is greater than where Michelson and Morley conducted their experiment.
He also said, compared to speed of light Earth was (in Heliocentrism) stationary or as good as.
Let's check that. Orbital speed : 29.78 km/s. Is it correct? I'll go by an approximation and treat "orbit" as a circle with "semi-major axis" as radius. 149598023 km * 2 * π = 939952100.096[km]. 365.2425*24*60*60 = 31556952 s.
939952100.096 km / 31556952 s = 29.786 km / s.
I'll go by 29.78 km/s as verified, right order of magnitude.
Speed of light: 300,000 km / s.
300,000 / 29.78 = 10,074. This is then the kind of relation we are looking for.
For instance, the Fizeau–Foucault apparatus could measure the speed of light to perhaps 5% accuracy, which was quite inadequate for measuring directly a first-order 0.01% change in the speed of light.
1/10,074 = 0.0000992654357753
0.0001 = 0.01 %
So, what Michelson Morley, with better apparatus than Fizeau-Foucault were trying to measure was precisely the speed change in light which would result from an orbital speed through a stationary aether.
I hold Matthew Hunt refuted.
Luminiferous aether is impossible (if stationary) if Earth is moving through space as thought.
Earth moving through space as thought is impossible in a luminiferous aether not moving with it.
Michelson Morley either refutes aether or Heliocentrism. I prefer it refuting Heliocentrism. For more than one reason.
Hans Georg Lundahl
I Passion Sunday
* If you want the whole context, here is a dialogue, on another blog: