Parallactic Motion

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parallactic motion [¦par·ə¦lak·tik ′mō·shən]

(astronomy)

An apparent motion of stars away from the point in the celestial sphere toward which the sun is moving.

Parallactic Motion

the apparent motion of a star on the celestial sphere as a result of the motion of the solar system relative to the star. A part of the star’s proper motion, the parallactic motion is directed toward the antapex, the point on the celestial sphere directly opposite the apex of the sun’s way, that is, the point toward which the sun is moving.

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