IMPROPER MOTION

The 'improper motion' of a star refers to the change of its coordinates on the sky not originating from the motion of the star itself, as opposed to proper motion.

Contents
Sources of improper motion
See also

Sources of improper motion



★ Aberration of light

★ Diurnal motion

★ Nutation

★ Parallax

★ Precession of the equinoxes

See also



★ Proper motion

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