Parallactic-motion



noun, Astronomy.
1.
the apparent motion of stars due to the earth’s orbital motion.

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  • Parallax

    [par-uh-laks] /ˈpær əˌlæks/ noun 1. the apparent displacement of an observed object due to a change in the position of the observer. 2. Astronomy. the apparent angular displacement of a celestial body due to its being observed from the surface instead of from the center of the earth (diurnal parallax or geocentric parallax) or due […]

  • Parallaxis

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