Elements of theoretical and descriptive astronomy, for the use of colleges and academies (1901)
White, Charles J · New York: J. Wiley & sons · leaf 125
es.Owing to the minuteness of the velocity of any point of theearths surface about the axis in comparison with the velocityof light, the diurnal aberration is extremely small, its greatestvalue being less than ^d of a second of arc. 125. Annual Aberration.—The displacement of a star occa-sioned by… … to the plane of the ecliptic, as may be seen in Fig 50. In thiifigure S represents the sun, ABCD the orbit of the earth, and Kthe pole of the ecliptic. Suppose a star to be at K. As the earthmoves through A, in the direction indicated by the arrow, theEtar will be displaced from iTto a; as the…
Astronomy
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