radial motion

radial motion
the component of the motion of a star away from or toward the earth along its line of sight, expressed in miles or kilometers per second and determined by the shift in the wavelength of light emitted by the star. Also called radial velocity. Cf. redshift, tangential motion.

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Universalium. 2010.

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  • radial motion — noun see radial velocity 2 * * * Astron. the component of the motion of a star away from or toward the earth along its line of sight, expressed in miles or kilometers per second and determined by the shift in the wavelength of light emitted by… …   Useful english dictionary

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  • radial — adj. & n. adj. 1 of, concerning, or in rays. 2 a arranged like rays or radii; having the position or direction of a radius. b having spokes or radiating lines. c acting or moving along lines diverging from a centre. 3 Anat. relating to the radius …   Useful english dictionary

  • radial velocity — noun motion of a star toward or away from the earth …   Wiktionary

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