Portions of this entry contributed by Dana Romero
Stellar aberration is an apparent shift in the position of stars due to the motion of the Earth Eric Weisstein's World of Astronomy as it orbits the Sun, Eric Weisstein's World of Astronomy especially for stars away from the ecliptic (i.e., the orbital plane of the Earth). It was first measured by Bradley Eric Weisstein's World of Biography around 1728, who found aberrations of at most 20.5 arcseconds (Duffett-Smith 1992, p. 62) that occurred at the celestial poles.
Planetary Aberration, Speed of Light
References
Duffett-Smith, P. "Aberration." §36 in Practical Astronomy with Your Calculator, 3rd ed. Cambridge, England: Cambridge University Press, pp. 62-63, 1992.
Harwit, M. Astrophysical Concepts, 2nd ed. New York: Springer-Verlag, 1988.
MathPages. "Stellar Aberration." §2.5 in Reflections on Relativity. http://www.mathpages.com/rr/s2-05/2-05.htm.
Misner, C. W.; Thorne, K. S.; and Wheeler, J. A. Gravitation. San Francisco: W. H. Freeman, 1973.
Weinberg, S. Gravitation and Cosmology: Principles and Applications of the General Theory of Relativity. New York: Wiley, p. 236, 1972.