proper motion


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proper motion

n.
A gradual change in the position of a star or other object on the celestial sphere that is the result of the object's intrinsic motion through space rather than mere apparent motion as observed from Earth.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

proper motion

n
(Astronomy) the very small continuous change in the direction of motion of a star relative to the sun. It is determined from its radial and tangential motion
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
References in classic literature ?
As the foreman of a spinning mill, when he has set the hands to work, goes round and notices here a spindle that has stopped or there one that creaks or makes more noise than it should, and hastens to check the machine or set it in proper motion, so Anna Pavlovna moved about her drawing room, approaching now a silent, now a too-noisy group, and by a word or slight rearrangement kept the conversational machine in steady, proper, and regular motion.
Let such bethink them, if the sleepy drench Of that forgetful Lake benumme not still, That in our proper motion we ascend Up to our native seat: descent and fall To us is adverse.
The motions of factions under kings ought to be, like the motions (as the astronomers speak) of the inferior orbs, which may have their proper motions, but yet still are quietly carried, by the higher motion of primum mobile.
His point of order was however overruled by Senator Lawan, who urged him to bring a proper motion at a later date.
But Geier's team examined the star's position on old photographic plates to measure its proper motion, the apparent movement across our line of sight.
'Move a proper motion to form a committee for designing the code of conduct,' he said.
On her timely and proper motion, the court will also award attorneys' fees and costs.
For 1.33 billion of those, Gaia also calculated the parallax and proper motion.
The gentle, meditative movements emphasize proper motion in coordination with breath, making qigong the right choice for preventing, treating, and healing back pain.
This paper aims to obtain the common algorithm for the direct displacement analysis based on the Newton method and then the common kinematic constraints of 6-PSS parallel robot for a proper motion domain determination.
In many cases, the court will still allow the accused to leave the country for legitimate reasons if he files the proper motion,' he said.
When giving casting lessons, I have seen the weight and slickness features help new casters pick up the proper motion with minimal effort.