Proper Motion

Details Proper Motion Proper Motion

Nov 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000eaa..booke1860w&link_type=abstract

"Encyclopedia of Astronomy and Astrophysics, Edited by Paul Murdin, article 1860. Bristol: Institute of Physics Publishing, 2001

Astronomy and Astrophysics

Astrophysics

Coordinates, Time, And Motion, Positional Concepts

Scientific paper

Proper motion is the change of position of an object on the celestial sphere, usually measured in seconds of arc ('') per year (figure 1). `Proper' means intrinsic, as opposed to a motion due to change of coordinates (such as precession). The term is most often applied to stars but is also used for changes in position of clusters of stars, galaxies outside our Milky Way and features within these...

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