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aberration of starlight
1. The tiny apparent displacement of stars resulting from the motion of the earth through space.
2. Apparent displacement of a star from its true position, due to the combined effects of the speed of light and the speed of the earth in orbit around the sun (about 30 kilometers per second or 18.5 miles per second).
This entry is located in the following unit: Astronomy and related astronomical terms (page 1)