The "'aberration of light "'( also referred to as "'astronomical aberration "'or "'stellar aberration "') is an revolves around the Sun, by a maximum angle of approximately 20 arcseconds in right ascension or declination.
22.
The actual evidences that finally proved heliocentrism came centuries after Galileo : the stellar aberration of light by James Bradley in the 18th century, the orbital motions of binary stars by William Herschel in the 19th century, the accurate measurement of the stellar parallax in 19th century, and Newtonian mechanics in the 17th century.
23.
At that time, the opponents of the special theory of relativity reasoned that the theory must be flawed, because it would state that the stellar aberration would depend on the relative velocity of the star which would be in contradiction to observation and R . Emden's article explains that the special theory of relativity does not predict this.
