One-way Speed of Light/Isotropy of Aether (again) (クリ)
English version of Wikipedia has an item titled "One-way speed of light". Word isotropic is found in 27 places.
However, if the light from multiple celestial bodies on the celestial sphere is recorded and analyzed in outer space, one-way speed of light will become disclosed. Probably easily. By established means of measuring aberration.
The position of bright lines and dark lines in spectrum of the celestial body's light will show the speed of celestial body's light and speed of light relative to Earth (and Aether drift). The isotropy and uniformity of aether will also be disclosed.