parallactic motion

parallactic motion

See parallax.

Collins Dictionary of Astronomy © Market House Books Ltd, 2006

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.

McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

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.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.