Speed of lightAether is the distance that light travels in one second, 299,792,458 m/s (defined value). Above value was obtained by measuring frequency and wavelength of laser light performed by Evenson et al in 1973 (error was ± 1.2 m/s).
Suppose that frequency and wavelength of light coming from two fixed stars located at symmetrical points (at opposite ponts) on the celestial sphere. Measuring must be done simultaneously. Perhaps many of the measured speeds of light are different. If so, it will be possible to identify two points (on the celestial sphere) where the difference is greatest.
Note) Differences due to known mtion of Earth such as revolution and rotation must be excluded.
Note) Wavelength must be measured before the light enters mediums such as glass.
